Malicious PDF — malware analysis report

Static analysis result for SHA-256 6629bac6118e1d78…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 02:45:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 658bc258af46cdc97d4ed19cacd755af SHA-1: 7e32f187b52d384eb900c172fa4743cf9fbfdd30 SHA-256: 6629bac6118e1d78b4a901adebf9f73268e286fb242cf3edc870508d4e81380c
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/get-free-coin-master-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-free-free-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-into-roblox-and-get-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/robux-win_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-1m-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-avatar-animations-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-free-spins-coin-master-link_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_off00003795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3795 22520 bytes
SHA-256: 6a0fdf2d5769a8dcdb6d557e289beef802afc64a287569661a4b39487c4ced1a
font_01_sfnt_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 17996 bytes
SHA-256: 2218a26fc20f3381b15a6c1d56b0fba8ed575611d7fe9869e239c8e40abe84e3

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