Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af73a629ea45edb…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 12:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: a592e4a8c393fed1737ba4f3b1be38a6 SHA-1: 561e29c67ae50ec2ffad5170344b7eaa536d1d53 SHA-256: 4af73a629ea45edb7931689526314ee437db52deb3ba61eb61fd78ad3061e937
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/how-to-get-free-robux-on-pc-game-hack In PDF document text
    • http://lib.unar.ac.id//repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-change-name-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-roblox-robux-hack-generator-download_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-free-robux-without-surveys_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_off00002f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F79 22408 bytes
SHA-256: 86493f0db1e65083b0ea242f52ba7915dc7ec02ba280141e63a548ccec826fc7
font_01_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 19136 bytes
SHA-256: aef8c40112b84489b97b1b1a2bbf6c88e9b8fe4bc85a356f803a45374dab5087