SUSPICIOUS — rbxfree-com-free-robux_GM431946152.pdf

SUSPICIOUS — rbxfree-com-free-robux_GM431946152.pdf is a pdf sample analyzed by MalwareAnalyzer by Cyble with a suspicious verdict (56/100). 4 of 53 detection engines flagged it, exhibiting 2 ATT&CK techniques.

Identification

• SHA-256: fdb6edd5cc9334ad768779c33971ec31c8892d8369e2b40afb802a6637dc44be
• SHA-1: 1e6ea47ad36727e0967b0f0197f77e59335efcba
• MD5: bec0bd88951fb815ccdddae6ea519208
• ssdeep: 768:yPUtb5ytVcZvA9R4O+Nu6bzfzg83x+AV4Arstdlo2rWv6+Ic6k7lzsoE:1FyIOoO+rbzs83fmAIRoSWxIc6ktsoE
• TLSH: T13C328DF3409BCD4C6A8E9F032DF7255EA0E9E3C96032DA5451D8363D807D6AE7B10921
• Submitted as: rbxfree-com-free-robux_GM431946152.pdf
• File type: pdf · Size: 44445 bytes
• Verdict: suspicious (56/100)

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!BEC0BD88951F

MITRE ATT&CK

• T1112
• T1105

Why this verdict

The suspicious score of 56/100 is the fusion of 6 weighted signals:

• Embedded network infrastructure: https://netcdn.online/app/431946152/rbxfree-com-free-robux-game-hack, http://perpus.ar-rum.ac.id//repository/minecraft-free-download-android-apk_GM479516143.pdf, http://perpus.ar-rum.ac.id//repository/optifine-minecraft-pe_GM479516143.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 12 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)

9658 behavior events · 1 ATT&CK techniques · 3 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• searchapp.bundleassets.example
• to-do.office.com
• staging.to-do.officeppe.com
• teams.cloud.microsoft
• outlook.office.com
• inference.location.live.net
• 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
• 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
• 252.0.0.224.in-addr.arpa
• 255.255.254.169.in-addr.arpa
• 251.0.0.224.in-addr.arpa
• ntp.ubuntu.com
• desktop-hsgcbep
• 79.243.254.169.in-addr.arpa
• 250.255.255.239.in-addr.arpa
• http://www.msftconnecttest.com/connecttest.txt

Dropped files

• C:\Users\analyst\AppData\Local\SumatraPDF\SumatraPDF-settings.txt - 4519367a5d3aa2ebfaa22f000ff1bbbd66e3269a444d85d69ad2e5b42fb8783a
• C:\Users\analyst\AppData\Local\SumatraPDF\sumatrapdfcache\d466bdcf4a12cd7bb3ad5b0c328eae9e.png - 3cb81cfd27c8d7d0c54bd438e0398ca7fef2a7978ba7607a9df2f6ffd0b7198f
• root_.cache_dconf_user - 96a296d224f285c67bee93c30f8a309157f0daa35dc5b87e410b78630a09cfc7

Embedded URLs

• https://netcdn.online/app/431946152/rbxfree-com-free-robux-game-hack
• http://perpus.ar-rum.ac.id//repository/minecraft-free-download-android-apk_GM479516143.pdf
• http://perpus.ar-rum.ac.id//repository/optifine-minecraft-pe_GM479516143.pdf
• http://perpus.ar-rum.ac.id//repository/apps-for-free-robux_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/mcmaster-club-coin-master-hack_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/free-google-play-promo-codes-coin-master_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/free-robux-app-2021_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/coin-master-hacks-for-spins_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/free-roblox-hack_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/coin-master-free-link-spin_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/blox-pink-robux-free_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/free-robux-codes-no-human-verification_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/roblox-free-roblox_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/coin-master-code-hack_GM406889139.pdf
• http://perpus.ar-rum.ac.id//repository/free-robux-that-actually-works_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdf
• http://perpus.ar-rum.ac.id/repository/free-avatar-roblox_GM431946152.pdf
• http://perpus.ar-rum.ac.id//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Embedded domains

• netcdn.online
• perpus.ar-rum.ac.id

Embedded IP addresses

• 72.154.7.112
• 4.150.223.112
• 52.110.12.3
• 162.159.142.9
• 20.236.44.162
• 52.110.12.45
• 52.123.128.14
• 52.168.112.67
• 52.123.252.215
• 4.230.171.124
• 162.159.36.2
• 40.99.133.242

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report