Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d00403c9c09381…

MALICIOUS

PDF

32.6 KB Created: 2021-07-19 18:12:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-27
MD5: ec6fd5f72f5d1b041cc6ef1a6b3b01c0 SHA-1: ea6311454bafc7f3254dd39a45b291f6ffe313c6 SHA-256: c5d00403c9c0938110144a22b30c978f308f45ae3cc637b71b102db5bf6f2985
160 Risk Score

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/431946152/earn-free-robux-for-roblox-game-hack In PDF document text
    • https://www.quistschoenenhalsteren.nl/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/minecraft-build-hacks_GM479516143.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_off00002bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC4 22300 bytes
SHA-256: a8c9df2032d979fb7c24e97a43a94be86b58a56c22716bd2f891a5ac4cac537d
font_01_sfnt_off00005cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 18504 bytes
SHA-256: ff3c46e153643819b6f5f78252fa4224f2b94fd95d76ee426fe9153007a53f2c

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