Malicious PDF — malware analysis report

Static analysis result for SHA-256 440b96d3e8725519…

MALICIOUS

PDF

29.2 KB Created: 2021-05-10 09:50:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bc46472b08dbda92ddcda7e63a7e766e SHA-1: 5d54ded3e298439cc2cb64ee07a2b57f4768ae32 SHA-256: 440b96d3e8725519a9f45b37dfbb19bab80510b1dddcc57684ff9c4ec5954bf1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator / game hack'. The document body and heuristics indicate a lure to a potentially harmful website. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's output strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8626

Heuristics 3

  • 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.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/wahoogaming-co-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002ff6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF6 26416 bytes
SHA-256: bf923a7efd2224f350e01f8ae8d971a9facf47d59b156f48e4090d24a89fb5a5

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