Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84f364a1ea1a331…

MALICIOUS

PDF

30.0 KB Created: 2021-05-10 11:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f886eea21bbfa15103bf42cffa5bf3e8 SHA-1: b8427fa80053632b6e85299b512760cfb4ff53b2 SHA-256: d84f364a1ea1a331c0e28c906a85a39847aef1fee7017d324a39559cc75ffd37
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "free generator" for Coin Master. The document body and heuristics confirm the intent to lure users to this malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8563

Heuristics 3

  • 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.
  • 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-spin-link-for-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000031e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E8 24060 bytes
SHA-256: 2ca60fb12cdcbc25a43767b93c681ac39f4fa7c3f1050dd0b31611193cca0855

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