SUSPICIOUS — robux-generator-no-human-verification-or-survey_GM431946152.pdf

SUSPICIOUS — robux-generator-no-human-verification-or-survey_GM431946152.pdf is a pdf sample analyzed by MalwareAnalyzer by Cyble with a suspicious verdict (66/100). 4 of 53 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

• SHA-256: 92915f4dff9a00de846917fe32fc10fdc0ee8590f24622551cc9baac3434a2a1
• SHA-1: 65a3896f2436f04a73352a1de4790019b3a729cb
• MD5: e49572fa1e954dbe59bed0f12d5ab3e0
• ssdeep: 768:AUA75R/8aevsadDYXpS3Ds+0qiXRri97DIWlTRqLV782G:AL/8HhipS3D10q5DIWTQV782G
• TLSH: T10F306CF34187DC5C3987AF439DFB719D788AD2896021D68081D8767CD0AC6EEAF50922
• Submitted as: robux-generator-no-human-verification-or-survey_GM431946152.pdf
• File type: pdf · Size: 36362 bytes
• Verdict: suspicious (66/100)

Detections (4 of 53 engines)

• MalwareAnalyser heuristics (entropy/packer): high-entropy-blob
• Microsoft Defender: Trojan:PDF/Phish.CFN!MTB
• Emsisoft (Emergency Kit): PDF.Spam.Heur.2
• Trellix Stinger (McAfee): PDF/Phish-TWM!E49572FA1E95

MITRE ATT&CK

• T1112
• T1105
• T1566.002

Why this verdict

The suspicious score of 66/100 is the fusion of 7 weighted signals:

• Embedded link rated suspicious by URL analysis: http://library.futureuniversity.com/repository/free-robux-rewards_GM431946152.pdf - network signal, weight 0.40, confidence 0.60
• Embedded network infrastructure: http://netcdn.tw/app/431946152/robux-generator-no-human-verification-or-survey-game-hack, http://library.futureuniversity.com/repository/free-robux-rewards_GM431946152.pdf, http://library.futureuniversity.com/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf - static signal, weight 0.35, confidence 0.60
• Document active content: uri-action - static signal, weight 0.30, confidence 0.60
• Packing/obfuscation: high-entropy-blob - static signal, weight 0.25, confidence 0.55
• Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
• Contacted 14 external host(s) at runtime - network signal, weight 0.12, confidence 0.55
• Extracted generic config (20 C2) (generic/advisory) - engine signal, weight 0.15, confidence 0.30

Dynamic analysis (windows)

9700 behavior events · 1 ATT&CK techniques · 3 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• searchapp.bundleassets.example
• to-do.office.com
• staging.to-do.officeppe.com
• teams.cloud.microsoft
• outlook.office.com
• outlook.office365.com
• outlook.cloud.microsoft
• 2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 252.0.0.224.in-addr.arpa
• 3.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• ntp.ubuntu.com
• desktop-hsgcbep
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Dropped files

• C:\Users\analyst\AppData\Local\SumatraPDF\sumatrapdfcache\84bdaf2d389ac65fcc67161c8c46aa82.png - 4760a9929e0c5c5d39c8c6e9636c17f050d53a1118b8aa35937a9d28e0a66b87
• C:\Users\analyst\AppData\Local\SumatraPDF\SumatraPDF-settings.txt - 37fa8d7e4c2e1d0db22693d31de1326464caa2eb514df59a28b75f36b851e3d0
• root_.cache_dconf_user - 96a296d224f285c67bee93c30f8a309157f0daa35dc5b87e410b78630a09cfc7

Embedded URLs

• http://netcdn.tw/app/431946152/robux-generator-no-human-verification-or-survey-game-hack
• http://library.futureuniversity.com/repository/free-robux-rewards_GM431946152.pdf
• http://library.futureuniversity.com/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
• http://library.futureuniversity.com/repository/roblox-catalog-admin-free_GM431946152.pdf
• http://library.futureuniversity.com/repository/how-do-you-hack-on-roblox-2021_GM431946152.pdf
• http://library.futureuniversity.com/repository/free-robux-hack-2021_GM431946152.pdf
• http://library.futureuniversity.com/repository/can-free-models-steal-your-password-roblox_GM431946152.pdf
• http://library.futureuniversity.com/repository/how-to-get-bloxburg-for-free-roblox_GM431946152.pdf
• http://library.futureuniversity.com/repository/roblox-noob-skin-free_GM431946152.pdf
• http://library.futureuniversity.com/repository/roblox-for-windows-7-free-download_GM431946152.pdf
• http://library.futureuniversity.com/repository/how-to-get-100-000-robux-on-roblox-for-free_GM431946152.pdf
• http://library.futureuniversity.com/repository/roblox-gift-card-free-no-human-very-or-survey-youtube_GM431946152.pdf
• http://library.futureuniversity.com/repository/roblox-hacked-download-free_GM431946152.pdf
• http://library.futureuniversity.com/repository/robux-hack-free-robux_GM431946152.pdf
• http://library.futureuniversity.com/repository/free-roblox-clothes-boy_GM431946152.pdf
• http://library.futureuniversity.com/repository/roblox-paid-hacks_GM431946152.pdf
• http://library.futureuniversity.com/repository/best-free-minecraft-hacked-client_GM479516143.pdf
• http://library.futureuniversity.com/repository/free-robux-no-verification-no-download-2021_GM431946152.pdf
• http://library.futureuniversity.com/repository/how-to-make-robux_GM431946152.pdf
• http://library.futureuniversity.com/repository/roblox-robux-hack-no-survey-or-download-2021_GM431946152.pdf
• http://library.futureuniversity.com/repository/free-roblox-svg_GM431946152.pdf
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Embedded domains

• netcdn.tw
• library.futureuniversity.com

Embedded IP addresses

• 52.168.117.168
• 20.184.175.19
• 52.148.114.188
• 74.179.77.204
• 52.110.12.53
• 20.231.239.246
• 4.150.223.108
• 135.232.92.97
• 52.123.129.14
• 20.42.65.89
• 92.223.78.30
• 162.159.36.2
• 203.26.79.13
• 4.230.171.124

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report