Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db261855c51337b…

MALICIOUS

PDF

37.2 KB Created: 2021-04-19 15:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b5c00b1757ebe6c427d0435d3070f5d0 SHA-1: 34ef6c62f3f822633c8ce94fb014e0b18c3c50a3 SHA-256: 7db261855c51337b1350d1bfb0d19e3d833bc9f700e046d58dba51b33ef9077e
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs pointing to websites offering "free generators" or "game hacks" for Roblox. One heuristic specifically identifies a "PDF_GAME_HACK_REDIRECT_LURE" pointing to `https://gaminggenerator.org/app/431946152/roblox-login-free-online-game-hack`. The document body also contains text related to Roblox and a call to action to access a generator. This indicates a phishing or malware distribution attempt.

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/roblox-login-free-online-game-hack PDF link annotation
    • https://freerobux.cyouIn PDF document text
    • https://robux-rank.comIn 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_off000036ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36BA 25452 bytes
SHA-256: abc53eb8db839f2a1dcdce7f978042a7c2903fd8ffa5178d53cf68e840d35edb
font_01_sfnt_off000071e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E5 17748 bytes
SHA-256: 1cf28084de54a88f2e8fe394f54828301e873d533e29a64fc7373ae4e94da804

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