Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa27f81815839cc6…

MALICIOUS

PDF

37.9 KB Created: 2021-05-14 20:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac95ad7a363dbec06df36c3c63380a2d SHA-1: 5e0e471db8e4cdde477ed299ea955678fdd04e2e SHA-256: fa27f81815839cc6a54198d184f65c1c42efa68e651c4fcd8e6c2ecf1d50bdbf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a malicious redirector link disguised as a game hack generator, intended to lure users into clicking it. The link points to infrastructure known for malicious redirects. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0126

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/406889139/free-coin-master-gifts-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003265.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3265 23992 bytes
SHA-256: 81e959aaa85232fc7766a35a22ce84a28fce4ec8aa6c4b0c795a7eb66bf084f9
font_01_sfnt_off0000690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 3228 bytes
SHA-256: f3cb21a2c58c98545df60c62f4e2b5cf4584d00c642a3cb5b89987787aefa173
font_02_sfnt_off00007452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 17712 bytes
SHA-256: a02a8482596092bbe2b4efe270951b6f574c255f03fc3b97eeb87af209467e86

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