Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53450a2a8975b37…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 13:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 926d332cb5047d0f60b692e7bfc89123 SHA-1: 50626c72eceeccd550d86ff1b5352404ae47ecc0 SHA-256: b53450a2a8975b374663be271d9747604cf91b872730925a8169eab127c3af5e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is malicious, specifically linking to game hack lures. The document body and embedded URLs reinforce this, pointing to sites offering 'free generators' or 'hacks'. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-girl-hair-not-a-model-game-hack PDF link annotation
    • http://kukuck.de/images/pubg-uc-price-in-nepal_GM1330123889.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-gold-cards_GM406889139.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_off0000331b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331B 24960 bytes
SHA-256: 3b24a72a25b80b5a7ee61fd78ca2a03ec7636b0777176c842c16c66b0f77bd85
font_01_sfnt_off00006cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAE 18772 bytes
SHA-256: 66482e13b1b0d91169bd4f4980226da82ba760cd479aff25d2e3a1e388705405

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