Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90ed6bda7bcf634…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 15:26:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4f22eb5c7854ea92391e3ba0b8245ad3 SHA-1: 6d88c8afd33936be91632436a76d975b41e35c4e SHA-256: a90ed6bda7bcf634c81d0b722ed5b6c01c60c0ad08ab30bfae80eeeaa084b1a9
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/406889139/coin-master-free-gold-cards-link-2021-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/can-you-get-free-robux-from-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-50k-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/join-this-roblox-group-for-robux-free-london_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/dragon-ball-af-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-hack-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/bit-slicer-roblox-infinity-jump-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-robux-claimer_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/tiktok-free-8-ball-pool_GM835599320.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_off00002ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFB 22728 bytes
SHA-256: a6eea01d372d6148a1dc31c5698a19b8f0e8f047bb55b6ffedd4653bcdbff842
font_01_sfnt_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 18816 bytes
SHA-256: a09a8837ace1bec76e2012f82a307e89209edfbda6266aa859e2874e1a9d6b2a

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