Malicious PDF — malware analysis report

Static analysis result for SHA-256 66de7a1fdd75171a…

MALICIOUS

PDF

38.1 KB Created: 2021-05-21 22:32:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f3099a4cce4a9d36baf6fcf0112ccbc7 SHA-1: 20ebe2df767ea624bc9a46e7f25b361a92053c42 SHA-256: 66de7a1fdd75171a9d41fcb1adee22ddc3d1be88e20cccf6e95d386c6c5c9975
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 0.9407

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-roblox-accounts-with-robux-game-hack PDF link annotation
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003794.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3794 25508 bytes
SHA-256: f317f40e5242216d11a29717a8cc34e89b6c5d9b1efe5174309a10ba72aa3be0
font_01_sfnt_off00007280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7280 18676 bytes
SHA-256: 4ebcf990001f3b6d5b8f187221ce9c528a6bcbfca241b55ad06a715c23028265

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