Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf08e322948c82b…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 07:02:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb980327c6da2e84f48a74595513f44a SHA-1: da014b1d13e4b3baedcf7cbace332dc13b536f98 SHA-256: 3cf08e322948c82b459f5b61520be041c852f2219f44af2929d46159c54d66c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'Coin Master Mod Game Hack'. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded links are the primary indicators of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-mod-game-hack In PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B6 25128 bytes
SHA-256: 7be10c76b4a4acea5459d9d5b0d9e9ef447ae2eaa19216c1d8edc7b1f7261daa
font_01_sfnt_off00008bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 3460 bytes
SHA-256: 582708023ba280d4d50e04d3196ed4a98a24323596270ce5a55f31618faa5208
font_02_sfnt_off0000972f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 17720 bytes
SHA-256: e3dc30cd69473f08b9483bb660e9aeaccc8f6f74c3e4f353697525059d592d8d