SUSPICIOUS — offscreendocument_main.js

SUSPICIOUS — offscreendocument_main.js is a script sample analyzed by MalwareAnalyzer by Cyble with a suspicious verdict (54/100). 0 of 53 detection engines flagged it.

Identification

• SHA-256: ae0a1e0da6effb15bb71856e82d36d69a8253366c941f648b7cbec3f74b0a73e
• SHA-1: de145039c6b39d93e8dd71b0422cedfbe922e44d
• MD5: 1aadc976de4e7ac3c9c088fce65efdce
• ssdeep: 3072:jtM1nfefCnUaBK2PcLVdv/ouT48bOlmfM3yPLk9KsPD:jtMOq1aiHmfM3yPLk9KsPD
• TLSH: T1573DA4EE38496FEDDC0E58967E88B89B37035A65F5E1A4E4C2BCD78468E4CE03D48414
• Submitted as: offscreendocument_main.js
• File type: script · Size: 129822 bytes
• Verdict: suspicious (54/100)

Detections (0 of 53 engines)

No engine flagged this sample.

Why this verdict

The suspicious score of 54/100 is the fusion of 2 weighted signals:

• Obfuscated powershell script: dynamic-exec, defense-evasion (rule script-deobfuscation) - static signal, weight 0.55, confidence 0.75
• Embedded network infrastructure: http://www.broofa.com - static signal, weight 0.35, confidence 0.60

Dynamic analysis

No runtime behaviour was captured for this sample, so the analysis above is static only. That is a limit of this run rather than evidence the sample does nothing.

Embedded URLs

• https://cdnjs.cloudflare.com/ajax/libs/mathjax/
• https://www.gstatic.com/_/apps-fileview/_/js/
• http://www.broofa.com

Embedded domains

• y.prototype.ca
• a.name
• b.name
• a.constructor.name
• this.name
• q.ua
• ug.prototype.ua
• a.ca
• hh.prototype.ca
• lh.prototype.ca
• this.ua
• q.ga
• this.ga
• this.ca
• h.za
• this.za
• q.za
• a.cf
• e.name
• g.ga
• infird.com
• walkme.com
• cdnjs.cloudflare.com
• secured-pixel.com
• navigator.online

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report