Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0eb454da19dd741…

MALICIOUS

PDF

32.6 KB Created: 2021-07-03 11:20:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 63119e6ccccdd853afcbfa8167c4e8c2 SHA-1: 2a0417701243d63191f6ee0d2005265fca17c966 SHA-256: f0eb454da19dd741beedd756ccae39afa51ea73d0688c417c21a60999250733a
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 0.9824

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.tw/app/431946152/free-robux-without-verification-game-hack PDF link annotation
    • http://library.stembi.ac.id/repository/get-free-stuff-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-have-free-robux-with-site_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/fairy-world-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/admin-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-servers-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-boy-face_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-pbb-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/como-hackear-cuentas-de-roblox-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-mod-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-invitations-loadstrings-full-lua-free-no-virus_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/can-you-make-gamepasses-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-vehicle-simulater-hacks_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-shirts-and-pants-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-tips-tricks-and-hacks_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/cool-skin-roblox-free_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_off00002ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD1 21344 bytes
SHA-256: 124a0f9418c2e8bd544ac77e7c9e42894792fe70ebf5bb54bf649645eafa0d64
font_01_sfnt_off0000599e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599E 19436 bytes
SHA-256: 45b9ce1014872b369476cc75d8a7b63b2e3ed395e28419daf66bd30eabd4401a

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