Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cc0c8666d273f0…

MALICIOUS

PDF

32.2 KB Created: 2021-07-23 19:22:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 966a0f55e67f774bab3d4b60b1a9dd1e SHA-1: 71c5fa865f81240e2aec0a36caff7b3a17b08bc0 SHA-256: a5cc0c8666d273f0d5cd2f5e41884deb5d7efb41f7bf915b83dcbc5fbbd3b663
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are likely part of a scam, promising free in-game items for popular games like Coin Master and Minecraft. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that these links point to known malicious redirector infrastructure. The document body explicitly mentions 'Get Free Spins Coin Master' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. While no scripts were extracted, the embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/406889139/get-free-spins-coin-master-game-hack In PDF document text
    • http://fairwaygolftravel.co.uk/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://fairwaygolftravel.co.uk/images/how-do-you-get-free-robux_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_off00002a50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A50 22696 bytes
SHA-256: 15d19be3bd9a6f50e9e118c258612d98a05004321db4e0531dd349111d30a271
font_01_sfnt_off00005d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D06 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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