Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d4e7e640674567…

MALICIOUS

PDF

31.4 KB Created: 2021-06-25 14:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 85cd7644d6c86c08b04a4fe4ff1487a4 SHA-1: 47b9735854e944a641fbbe037602f5e3dce6655c SHA-256: 61d4e7e64067456773f18fad8fac5f0aa5b0e93911eab44dfbdc748fe8620858
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector link that leads to a 'free generator / game hack' lure. This link, http://netcdn.co/app/431946152/free-check-it-roblox-game-hack, is identified as malicious infrastructure. The document body, though heavily obfuscated, contains references to this URL and appears to be designed to trick users into clicking it, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0580

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.co/app/431946152/free-check-it-roblox-game-hack In PDF document text
    • https://www.roblox.com/.IIn 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_off00002587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2587 22280 bytes
SHA-256: 3e83b39e399ea7777f9a731c16d23f8443629e6069a442943955e8d66d873e51
font_01_sfnt_off000056e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E5 19088 bytes
SHA-256: 3198443d91040a766bc64950475a1f3157c12b387111c0ed2bf7f70c0bf1ee53