Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2f81cc6b0466b7…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 05:25:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 05dccc9956a6931d80d6a690983549f1 SHA-1: b7e2bc6c119a49603d460f44ba34030226f2d309 SHA-256: af2f81cc6b0466b7f08e67c7858f3d072f17b5da88c9d27871ef7796f7f2ecb6
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.tw/app/431946152/roblox-robux-hack-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-dex-explorer-hack_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-traversed-wall-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-robux-claimer_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/pubg-uc-zip_GM1330123889.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/island-royale-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/i-give-free-robux-for-get-my-clothes_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
font_00_sfnt_off00002d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4C 22316 bytes
SHA-256: 0299aa84568d113a28c4350d5d9ca18cac124c697c2db8cba5e783a2325a25be
font_01_sfnt_off00005ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF9 18796 bytes
SHA-256: ac85a7f36e8d2c6b778aa8e0527eba638abc788d16e2325ecdb460050b0ba6ed