Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1cd22b1183dae1…

MALICIOUS

PDF

7.0 KB Created: 2021-07-05 10:42:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 18013edf89e0fb7a9821c839d62e37ee SHA-1: 9ac90e3160f354eea9ec4e1e062c6c66c11e23b5 SHA-256: 6b1cd22b1183dae1fc4a3003b5bb30dc4b2f4443f9efb48a0604b5e65148fca2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9622

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 http://netcdn.tw/app/406889139/freespinandcoinblogspot-com-2021-11-coinmasterfreespins-game-hack In PDF document text
    • http://perpus.stikesphi.ac.id/repository/hacks-de-roblox-para-cualquier-los-juegos_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-25-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-hack-free-admin_GM431946152.pdfIn PDF document text

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