Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b9504378f1bbca…

MALICIOUS

PDF

15.6 KB Created: 2021-05-24 04:46:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8c61547bb7c18d9ab1dc707fe0b6013f SHA-1: 2f5eb7d274ceb79270938bc2eb3a49c2db3f917a SHA-256: 36b9504378f1bbcaac3e45e59b92b9265dceb1d312e5b2ef236179102756b877
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically advertising a 'free generator / game hack'. The ML classifier also flagged the PDF as malicious. The embedded URL is likely intended to lead the user to a site that attempts further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8330

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-spins-coin-master-unlimited-game-hack In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E11 5425 bytes
SHA-256: c6fc1b08af0af0dc552dfbe7b5d99b007d7a3189d5c8d8043030a8090354e31b

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