Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dfe5df0881edf3…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 12:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: b537f3e11762feff94b9aafa4c0a883b SHA-1: c695eade164a7d1182cede42c0801eea9f340bf8 SHA-256: c5dfe5df0881edf3c06c7cbd27b974bc3f8039d3b72e34a8d851a8e831ca6c19
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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/835599320/how-to-get-free-tiktok-coins-game-hack In PDF document text
    • https://www.wcauk.org/uploads/files/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-hack-roblox_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_off00002ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF1 22168 bytes
SHA-256: 35e6af34e4727ff2a0b70e4669ea593a160ee244ad04d5324028f3318ec36fb2
font_01_sfnt_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 17620 bytes
SHA-256: 5e08b925a0f8fe2d80e54c1999b1c3763f905cccf1acde0f5739739445e42325

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