Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a213c0d6ddf732…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 17:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 12cfe6d768715ce184201306bd4b6b48 SHA-1: c01e72814a19a044e5f9ebd16149b3213cb52fbe SHA-256: 87a213c0d6ddf73258035b130887f2b8d4f4c90f2fbb5df2a88d92120c0aa1cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • 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.
  • 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://netcdn.xyz/app/431946152/free-vip-server-roblox-game-hack PDF link annotation
    • http://acp-institut.fr/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-get-free-roblox-items_GM431946152.pdfIn 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
font_00_sfnt_off00003246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3246 25252 bytes
SHA-256: 12178bc4c33c7a29f098257506e298fb6502fb387f8dc1a6b61875f18cf48913
font_01_sfnt_off00006c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7A 18492 bytes
SHA-256: c1771e38e47f70d4d1a65a36e251d19cfd5d8120c02d48444b4cec837a0f1c39

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