Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf9081c4a6ad611…

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 13:08:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af52bdda9ad319169130bea3e55e89c1 SHA-1: 197e35b6f3aa87872a60cfb64a4b1c906cbdd555 SHA-256: cdf9081c4a6ad611fe163718661217e53fb3ab28ecd4a1398c6c8b53e29bcbf5
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be free game item generators or hacks. One prominent link directs to http://netcdn.tw/app/479516143/how-to-get-minecraft-windows-10-edition-for-free-game-hack, which is flagged as a malicious redirector. The document body, though partially corrupted, also contains references to similar lures and the authoring application indicates it was generated by wkhtmltopdf, often used for creating malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/479516143/how-to-get-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-robux-link_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
font_00_sfnt_off00003066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3066 22080 bytes
SHA-256: 86a6abb0c76ecdfad44a79e911257c3f78631f99f41f60e9368f23e4309d28e9
font_01_sfnt_off00006077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6077 18524 bytes
SHA-256: 758265ab9626b01b7f82acdeb793963e34ce825989d987f26b8b838bd6c44d94

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