PDF static analysis report

Static analysis result for SHA-256 f771934e4045b8ee…

SUSPICIOUS

PDF

29.0 KB Created: 2021-07-19 22:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: da0e8c9883b6a16c1ed3da4a37cf5ca6 SHA-1: 5f34332a715d47e45faa588949330be6685ce58b SHA-256: f771934e4045b8eeb22275ca837feb08d0040a687a779d45bb8bf57850493a61
52 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a prominent link and document body text advertising 'Free Robux' and a 'Robux Generator', which is a common lure for scams or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, pointing to the URL http://netcdn.tw/app/431946152/free-robux-exe-game-hack. While no scripts were explicitly extracted, the nature of the lure and the embedded URL suggest an attempt to trick users into downloading a potentially malicious executable or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0570

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 http://netcdn.tw/app/431946152/free-robux-exe-game-hack PDF link annotation
    • 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_off000020da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DA 21660 bytes
SHA-256: 6a314b6077b872bb041bd1a9134cd8905d291d7d7327230203bc53dcf607e27c
font_01_sfnt_off0000503a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503A 18200 bytes
SHA-256: 67527198e8f3e954f788e220fdc5e0efc04c24ca5928f64c044788dd6707c9fd

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