Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea3d65804e79144…

MALICIOUS

PDF

32.0 KB Created: 2021-07-19 01:40:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 786cd6ba306c0415aa6fa7017d35831d SHA-1: aac8d99dec61e63e632f919b0e763403086bebe4 SHA-256: fea3d65804e79144d9128074ee4bf66fc220f0f57a623a3bf2f68aa5a76067d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'free Robux' and game hacks. One prominent URL, http://netcdn.tw/app/431946152/free-robux-gift-card-codes-2021-game-hack, is flagged as malicious. The document body also contains a call to action to 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9582

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-gift-card-codes-2021-game-hack In PDF document text
    • http://genialica.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://genialica.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2653 22308 bytes
SHA-256: adb8fe711be7bbc77cab862b85c817517a5f2d8eaf3fed7833e133d0d06e867b
font_01_sfnt_off0000580f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580F 19228 bytes
SHA-256: f7aaffab7d527c7e353aaf331618a45d341d70589213c8f53d030cedf69c2433

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