Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f73235948d46290…

MALICIOUS

PDF

38.1 KB Created: 2021-04-14 11:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 724d42c5b7f13e962852ce37fc0c09a4 SHA-1: 988f8f1d367435c4d5cbc72ebc26e0a251fccd3b SHA-256: 6f73235948d462903b9b7df84f18d641e4110ecbf7142033b2cae21c28d19274
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a 'game hack' generator, which is a common lure for phishing or malware distribution. The document body and heuristics confirm this redirection attempt. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • 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.
  • 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/how-to-get-free-coins-in-roblox-pet-simulator-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_off000037de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37DE 26052 bytes
SHA-256: 31f3e5903f5d2ba16f647bc01d27ce21e65ea60cb3657510ec1b9a9205708fc7
font_01_sfnt_off000072a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 18704 bytes
SHA-256: c5bbc4b998207be4a22df48221901d51065db17ccc0faff15d8005a3091b0ecd

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