Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99fda9f12547b94…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 01:13:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-13
MD5: 7b9782c6ba0cc5ac039239618e48ff7a SHA-1: 685065ec4c1b1f5b010b785d6e0c1f7696f7595c SHA-256: f99fda9f12547b9425146ffa9402b3e4e03f0de555d1ae52c27757fb1c778219
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/how-to-get-unlimited-robux-for-free-2021-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/dungeon-quest-hacks-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-robux-for-free-no-scam_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/pubg-uc-shop-bd_GM1330123889.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-bedrock-free-download_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_off0000308c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308C 22204 bytes
SHA-256: b862def1af52d7be524ede916ce2ef4732cfd6aae78a4b3a9b6fd91672aefed8
font_01_sfnt_off000061d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 20012 bytes
SHA-256: de86ae51a793657daf066ed32d228d194ce03f49403f25f9b281e12c63f7ffb7