Malicious PDF — malware analysis report

Static analysis result for SHA-256 844b3a08376fd8bf…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 05:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c1e886857a99ba784fe7df2ef654047 SHA-1: 9df58f1e9ca2aaa2037258ec3bc088fdf332b79c SHA-256: 844b3a08376fd8bf9f42f411d1ce18f3eba43f849c49daaf76193c79b2c2c897
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a game hack generator, which is a common lure for malicious downloads or phishing. The ML classifier strongly flagged this PDF as malicious. The embedded URL points to a suspicious domain associated with such lures.

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/lucky-patcher-coin-master-hack-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hack-deutsch_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-editing-apps-to-edit-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-paino-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/www-play-roblox-for-free-com_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-hair-girl-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-tiktok-fans-without-verification_GM835599320.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.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_off000033fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33FD 23360 bytes
SHA-256: 1555b6bef0dbbe1a5eaab7b8cd22501d5f7e46141309cdfbef39f3bdf959fee1
font_01_sfnt_off00006892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6892 18644 bytes
SHA-256: 62d67ccd9da712bc6337db9d68f01eeacea3f740b309a08d4949e1f324755b54

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