Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f73bdcf59f388a9…

MALICIOUS

PDF

48.3 KB Created: 2021-06-13 19:54:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f90305b6e49ac944032c647f6b61c6ab SHA-1: a79390cde3e07ac4364bb9302238009146d69921 SHA-256: 0f73bdcf59f388a993fdb23038d8de7966ad79232f1e08acc8afad931d797bc8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9979

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-robux-without-survey-or-human-verification-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-lumber-tycoon-2-cheat-engine-money_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/guess-the-emoji-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hacks-and-exploits_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-mod-version-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
font_00_sfnt_off0000561d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x561D 29088 bytes
SHA-256: 427e86ce521f97ccec0192b5465cae92a8ab4131b62c23f9c9924d90cccfb381
font_01_sfnt_off00009742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9742 19520 bytes
SHA-256: 601795b4ba36901cf46e2a8a757fb8d411447528e259914657155f8ef34104a3

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