Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4178606fe5777d…

MALICIOUS

PDF

36.4 KB Created: 2021-05-17 11:30:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2770c73289d98890812f67c0aebe116 SHA-1: f8ebb225c3c29776720347b991316833e2fa4151 SHA-256: ad4178606fe5777dc3ff02264b8705621509ad7eedc881ebfb46676059159bdc
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically leading to a "free generator / game hack" lure. The document body text and heuristics confirm the intent is to trick users into clicking these links, likely to download further malware or lead them to a phishing site. No scripts were extracted, limiting the analysis of the payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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-game-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D9 25612 bytes
SHA-256: 9a89a3e1c0dbaeee8bd9def2d6656709a4fc161c7b3a31d356cbcdf57339c0ab
font_01_sfnt_off00006dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFE 17968 bytes
SHA-256: 26c9c4b875abe90d5a203e632a25aafef6162dffda8186c61deacbdf7b71a521

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