PDF static analysis report

Static analysis result for SHA-256 ef31b663bfe50d66…

SUSPICIOUS

PDF

38.8 KB Created: 2021-05-19 06:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 405307a528fd5e4c1f60989be5db67ff SHA-1: 54f8142164a621969ed042469f93e63b0d8d43a3 SHA-256: ef31b663bfe50d667df053dfdc29fc60b1104ec8e3d497279eeafaaf949809fe
52 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free Robux generator' or 'game hack', which is a common lure for phishing or malware distribution. The embedded URL points to a suspicious domain known for hosting such lures. While no scripts were directly extracted, the PDF structure and heuristics indicate an attempt to redirect the user to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-sites-2021-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000030c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C2 24512 bytes
SHA-256: b90d452ebce005a7a929a3805a52eef3879a279f64f9332fecbf105803a12eae
font_01_sfnt_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000074c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C5 18640 bytes
SHA-256: b8260c20a5a482fa631977c1895ef4fabb59c0a91f65cf95745fb521070d0a95

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