Malicious PDF — malware analysis report

Static analysis result for SHA-256 522c0ff6d0240e9c…

MALICIOUS

PDF

41.3 KB Created: 2021-04-28 17:57:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c85bec926763675b0b5cad662b5e6190 SHA-1: 7575b685fe935a210e7dcccbf873caf65df63904 SHA-256: 522c0ff6d0240e9c33ea838430282497bfd8c28b5ec1bf4ec2037ec58e126229
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/roblox-dinosaur-simulator-cheats-game-hack PDF link annotation
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-hats-robloxs.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/vbbwcom-free-robux.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/multigame-aimbot-hacks-roblox.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-hack-into-getting-robux.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/6-ways-to-get-millions-of-robux-unlimited-free-robux.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-hack-a-roblox-game-easy.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-3d-roblox-gun-models.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/bypassed-roblox-t-shirts-free.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-galaxy-arcade-cheats.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-booga-booga-fly-hack-may-26-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004236.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4236 26436 bytes
SHA-256: 766e0061af79c183f9f8c13f4e98c2b256f8127e5e2b2ed81259341447cb35ad
font_01_sfnt_off00007df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF0 18968 bytes
SHA-256: 7bbb6884ae64df9b779ead0bff33f43186cf4a401651908f373bd3ef0cdf914d

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