Malicious PDF — malware analysis report

Static analysis result for SHA-256 42525d157d8c3729…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 08:43:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: d8a977f85780f249be975b580bf2bcbc SHA-1: bf33caae88574899e933919d10f1b2de1d2721dd SHA-256: 42525d157d8c37294ce04070d19787f8c302b0fcf73671f7e33dd384d4d5cabf
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-app-free-download-game-hack In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pubg-50-uc-free_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-online-play-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-game-free-download_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
stream_004_off00005136.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5136 25332 bytes
SHA-256: 4c14717f6d5bc3b860801a73d7cfdca35238bd60b4027cce4cf149b869622fac
font_01_sfnt_off00008bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBB 18464 bytes
SHA-256: 40f30d03f9df9e16cedf50fa7ce351738090605bdee0a2874ac532244730da1c