Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0440760fde39a4…

MALICIOUS

PDF

13.7 KB Created: 2021-06-03 07:43:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 992b0cde3bfe0261ce41f491dba1eae6 SHA-1: 26e803e7b0df5e53b930d4a64184a62b69c4315e SHA-256: 5a0440760fde39a488c9c57c94f0b01e71c949a44b28ac8ed2116d6439a6c364
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-booga-booga-hack-game-hack, which is used to lure victims. The document body, though partially corrupted, contains references to game hacks and the authoring application, further supporting the lure. No scripts were extracted, but the embedded links are sufficient to classify this as a malicious redirector campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9587

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.online/app/431946152/roblox-booga-booga-hack-game-hack In PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text

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