Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3333c231ec403e…

MALICIOUS

PDF

45.3 KB Created: 2021-06-10 14:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 5a28c36dc46487d82bfa5e951837df8c SHA-1: 5d670d8962f54151a763b4b225592e8da697b2a7 SHA-256: 4e3333c231ec403e75d01d75e641a8543af78e8eb0f837ea77033f5f8f9e6084
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-robux-play-games-earn-points-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/infect-roblox-games-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-4all-cool-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-roblox-accounts-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-2021-without-verification_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_off000051e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E2 25404 bytes
SHA-256: cd73e2b71ceb2c877184551bebde473cdc57f8c89a692115c9a7233227b190ee
font_01_sfnt_off00008c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C15 19136 bytes
SHA-256: 696fd1ddda4a9f6f4b0065d466c70df547e15994f3a6516c2719163a840e94a8

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