Malicious PDF — malware analysis report

Static analysis result for SHA-256 425598b8c07b5798…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 06:46:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: cd8040b44df4bc2548824696df1db515 SHA-1: a67d0c3a55d32f7bf2449c797cf60e0d22061801 SHA-256: 425598b8c07b579828c833f77e4b6ed9e878ea7fb9eec34845f9dd89b02ab1ee
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-assasin-hack-script-2021-unpacthed-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-barbie-tips_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-wings-of-liberty-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-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_004_off00005043.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5043 25956 bytes
SHA-256: 484dbb8d8d76f5e35f4b5cd7a27d683ebcc129d738dff338f7e9865e192a61ab
font_01_sfnt_off00008bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF5 19508 bytes
SHA-256: 1dd2e55d05ed76a6ccb78d9fcb62cb5f94807b0c11c5240435176daf332216db

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