Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf4af7bf731a7f2…

MALICIOUS

PDF

33.9 KB Created: 2021-07-02 07:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3ef9f0c1917d02b8c1775d497ca95347 SHA-1: ecdf6c54aadd84e16511645c9efc7f745235308e SHA-256: fcf4af7bf731a7f27a0301a4c309b037e2ccca167fba57afe8d8fde9abaa9207
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.co/app/431946152/can-you-get-robux-for-free-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/jack-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-things-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/find-the-domo-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-xbox-gameachievements-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-admin-in-any-game_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-to-make-you-move-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-free-2021-sans-verification-humaine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-mad-city-hack-money-francais_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-course-dobstacles-dlirante-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pokemon-go-free-yanma_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-forumcom_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/nezi-plays-roblox-hacks_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_off00002dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCB 22364 bytes
SHA-256: 25d908a730a70e3e60da2aafe6ad3795cf472356ade247b71cba814cbda88961
font_01_sfnt_off00005f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 18984 bytes
SHA-256: 2c6f447800a96913986af3bd62aa8a594d802346a7a39b4742ef2d084cdb3097

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