Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39d4226cff1d1be…

MALICIOUS

PDF

5.1 KB Created: 2021-06-22 09:36:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6779c7ca05e6f2475fcc68515f6df624 SHA-1: ac49dd04aeff9bf70881df5d3bba69669fb88f9c SHA-256: b39d4226cff1d1bee4f32fb1c6faa0b76facb2375e06ff59b9778e4c15302add
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to external websites that are designed to lure users with promises of free game items and hacks. The ML classifier strongly indicated maliciousness, and the document body confirms the lure. The primary malicious URL identified is http://netcdn.co/app/431946152/free-t-shirts-roblox-to-look-like-a-pro-game-hack, which likely serves as a redirector to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9212

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 http://netcdn.co/app/431946152/free-t-shirts-roblox-to-look-like-a-pro-game-hack PDF link annotation
    • http://www.riverkennet.org/uploads/files/files/robux-best_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/10-robux_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/roblox-acc-hacken_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text

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