Malicious PDF — malware analysis report

Static analysis result for SHA-256 4781972d3dc6b1a2…

MALICIOUS

PDF

36.0 KB Created: 2021-06-30 11:45:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 678d5afd8deff3bb7b764bfbabed4dd9 SHA-1: 634ee9f2a4749c7332ec9ce9f26056fb3efc2151 SHA-256: 4781972d3dc6b1a2cb9206400a84cfed209c651daf39f89b0925d49f53ec1b35
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-free-money-in-jailbreak-roblox-2021-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-look-like-a-hacker-in-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-2021-how-to-cheat-in-fencing_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/procodes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-ways-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-a-bunch-of-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/ideos-de-thanos-en-roblox-como-perfil-free_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000337a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337A 22192 bytes
SHA-256: 293dc07a7bafc76984a02ff36674dc46332c0ce08e717cf86e258616c627c595
font_01_sfnt_off00006458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 20152 bytes
SHA-256: 2bf777436f8c025d13693e97f240ed1d0c04f438da604e78c5bbdd4464e2546a