Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91617a7dbd218bd…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 17:24:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5699e68cafe0b40e3128cdfe5c063427 SHA-1: 1ad472f2efbd01b52aed707e7c7f2bcd9fda7ba9 SHA-256: a91617a7dbd218bd0955de5f01908d3e897ecbc07b77718e93d7cae7aaa0d731
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 0.9980

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/roblox-girl-avatar-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/pastebin-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/codigo-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-cheat-in-growing-up-simulator-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/its-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/dessert-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-by-using-cookies-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/fre-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-omg-com_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-top-battle-games-read-online-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_off00002f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F96 21836 bytes
SHA-256: 2f90d2f99c6b601aa5658aa96c565b01db1a0382cfe0b98e0c37159c5f1f01db
font_01_sfnt_off00005fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD0 18824 bytes
SHA-256: a049bc211159218bd83ce46d7963f6a91c240f948409f01e9ddd8b42dda3a560

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