Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d482611d3ecbdf…

MALICIOUS

PDF

37.2 KB Created: 2021-05-10 23:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bc1331fc54b7a277cf3f99c082004ac0 SHA-1: 76d59cf416864e18bdb3e6888ed9ba345205b14b SHA-256: 08d482611d3ecbdffd29ca20a59ffa3c0e19fc173b5e58e0053ee957992a9091
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document was flagged as malicious. It uses a fake-CAPTCHA lure. 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 clean score 0.0334

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-generator-for-roblox-2021-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35B4 24776 bytes
SHA-256: 13f6c67a9aceba8b9f45feb26d07efe3a88b71ab7a62571423f2e03090c41135
font_01_sfnt_off00006e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E49 18820 bytes
SHA-256: ebe9c90542e8fe2fea15c90130dc88571bff9717049b6ef0e566bae53a322baf

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