Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99b8b989dd1a725…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 14:11:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-13
MD5: d56810332a00515ef88db8df2bce47d9 SHA-1: e161e79be2e05bd5e033d6783743fe627544a407 SHA-256: f99b8b989dd1a725134572b9db0521bd4be0271b200cda47a1fa8d5dbea89303
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-free-sword-fight-game-templates-game-hack In PDF document text
    • http://library.acehresearch.org/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-for-roblox-ios_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-any-roblox-account-dec-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-admin-roblox-gane_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/r-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/good-unifrom-making-software-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-roblox-using-artmoney_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-snow-shoveling-simulator-lua-c-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-links-2021_GM406889139.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_off00002f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F45 22256 bytes
SHA-256: 565996ee68e2ecc904c41f4131b5a9a1c88c19f78bb16c744fb37f5796d82055
font_01_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 19812 bytes
SHA-256: f0f4a289b966d5d77195a0dca12d6ad75a653cd2698af223bfef0ae6edef289f