Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4478e54ab252d8…

MALICIOUS

PDF

36.2 KB Created: 2021-05-30 03:36:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f33833d2ff341bfa182faaf4302937d7 SHA-1: 35f72ee28b706a9f458a31386b81ac301f454808 SHA-256: 9c4478e54ab252d8df00dca434d84587c6596b0988b729c789a84c55e64918e7
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 0.9064

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-robux-generator-no-human-verification-2021-game-hack PDF link annotation
    • https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://isaf.co.za/wp-content/uploads/fsqm-files/minecraft-hacked-client-112-2_GM479516143.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
font_00_sfnt_off000030f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F4 24484 bytes
SHA-256: e6ab88273f362f797e06c7ecdb026e53b337f8a31e045e7b3298e38b3a8fa651
font_01_sfnt_off00006932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 19260 bytes
SHA-256: cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4

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