Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d7a134bcd88440…

MALICIOUS

PDF

38.1 KB Created: 2021-05-12 03:11:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-27
MD5: 50220179bb62ac31d02ca12b883e73d1 SHA-1: 4f9f2937dafbeaa82b73b0723aee639b57a9c507 SHA-256: c5d7a134bcd88440e1d5d9b671bd832885d1c5ed70ee56426106e78399c1cf4e
130 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/free-roebucks-com-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
stream_003_off00003568.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3568 27628 bytes
SHA-256: 9bf88ea5b49f3fc7558dd4bad1cb0f8a405a0a1741184a988fd57590d6aecf63
font_01_sfnt_off00007425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7425 18236 bytes
SHA-256: acbd5711f3c405a9970fcfdb5585b9ec9d025850f2b671bb57125d23f3c9a6d7