Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af08edbcd749d15…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 09:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 21e2f235df409b8cb2202d7062fa250d SHA-1: af680bd2b16b67bac465036f9f0860d4e99f5853 SHA-256: 4af08edbcd749d15454930dfc6a96d2d6ebad4726e51f920bef1c3ccc6b5a38c
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/479516143/minecraft-mods-download-free-game-hack In PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-cheat-bubble-gum_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cerberus-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-prison-life-hacking-sex_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/bird-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/money-hack-roblox-adopt-me-2021-july_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robuxzone-wordpress-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-and-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pastebin-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-roblox-games-app_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-card-hack_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
font_00_sfnt_off0000331f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331F 21776 bytes
SHA-256: 98fab5a040637e4c57cb78159e259613ce19bf6367042eac87610c7e01ee9fd1
font_01_sfnt_off00006291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 18576 bytes
SHA-256: 7d81b8f4357a3ba39d5ed2eaef427c1fb3ec5456621d56fd5ab99f16751bc649

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