Malicious PDF — malware analysis report

Static analysis result for SHA-256 b091105c5ad4b97e…

MALICIOUS

PDF

35.9 KB Created: 2021-05-24 02:24:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ebfaaf184ced1cc1743c889d7247f30b SHA-1: 42e6432f6a1583fd63059e39c89686b38d04c681 SHA-256: b091105c5ad4b97e6a895eac4d3dbf168c8fc7c369489147b6f858a6d5b0e663
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free coins' and 'game hacks' for Coin Master. The document body explicitly contains the phrase 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' and directs users to the malicious URL. This indicates a social engineering lure designed to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-coins-coin-master-2021-game-hack In PDF document text
    • http://vcelarskepotreby.org/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robux-hack-me_GM431946152.pdfIn 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_002_off0000343d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x343D 24132 bytes
SHA-256: 35aacd0ef99bfee5fb0a1b07ba9dae4b836baf5c8b0b49e7f787312b8a7f3cd7
font_01_sfnt_off00006b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B95 18112 bytes
SHA-256: 0727bd4027d3f5eec951b181c2bc31ee4d98e10eed2c862aff41d240a04f60ea

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