Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c14493f3ee08d0d…

MALICIOUS

PDF

37.7 KB Created: 2021-04-21 11:53:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 09c169fb83fecbf378f05538ffb17be6 SHA-1: 0bdd23a430dcd6e944d1a912aa968a03364335dd SHA-256: 5c14493f3ee08d0d7ce3558d7a13e650c6b49077478d8e6c3cff37fc8d90e76d
112 Risk Score

Malware Insights

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

The PDF contains a prominent link to a website offering free game currency and hacks, which is a common lure for social engineering. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a typical method for credential theft or malware delivery. The presence of a "CLICK HERE TO ACCESS ROBLOX GENERATOR" call to action further supports this. The primary IOC is the URL associated with the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://gaminggenerator.org/app/431946152/ap-get-free-robux-and-tips-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_off000036db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36DB 25748 bytes
SHA-256: 250d2d47206b8590d0742f205bc5f38df175e5865dadc7bebb5961476ac7197e
font_01_sfnt_off000070ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 18652 bytes
SHA-256: 5898a81634583e735377876b87345244be8d1bf1c4f599a91af76e6ffc01e238

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