Malicious PDF — malware analysis report

Static analysis result for SHA-256 279a434cbf8204d3…

MALICIOUS

PDF

36.5 KB Created: 2021-05-13 16:34:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a785ef6e6177675687f388861266021 SHA-1: a8d0fd8579b0d8538ed8a979b9485af9d1f323a1 SHA-256: 279a434cbf8204d31729f846eae5fa079d578c65f1a550da5f222a6c5ae72cfc
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Robux Free Online' and a 'game hack', directing users to a malicious URL. This URL is flagged as part of a known malicious redirector infrastructure. The presence of a call-to-action button further supports the deceptive nature of the document, aiming to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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 https://netcdn.xyz/app/431946152/robux-free-online-game-hack In 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_off000032d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D5 25432 bytes
SHA-256: d5810530414290ddd4c421aa880b076d9c8c61af4a235f26de3db5ec67e4cb1c
font_01_sfnt_off00006db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB3 18208 bytes
SHA-256: 9c6e6aa5efa9903ee4d2fc70532f13b8880c04837d913a4df075592e4b137fb6

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