Malicious PDF — malware analysis report

Static analysis result for SHA-256 608b4695841b087b…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 12:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 10d0941649f22cc2fc6466116d74b2e4 SHA-1: 0b376590069d2471ffbd5beb15411bd6b7686922 SHA-256: 608b4695841b087b29ce13a4b080808d37fdc0204f079e4ba0fd61386f7d618a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/roblox-free-robux-no-verification-game-hack PDF link annotation
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/mcpe-com_GM479516143.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_off0000492c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x492C 24912 bytes
SHA-256: 59310658731e393779d988f87a1eb30a5acbb843f5b7dd689676833852652d98
font_01_sfnt_off00008155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 18676 bytes
SHA-256: d88aecf2630d4fcf6e85b9a2b5560aad6055705ec2bb19cbd5d89ce1bd292ac8

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