Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4229f26bb972821…

MALICIOUS

PDF

49.0 KB Created: 2021-06-08 17:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0be4f7fe10e66d208e493a99c2159a11 SHA-1: f7416b2d2997f9ca02fa73733705244dd1871549 SHA-256: b4229f26bb972821790fb4ac9277b581aacc0d9b38ba99142bd17d5949f4ae1a
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 0.9796

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 https://netcdn.tw/app/431946152/roblox-vip-pass-free-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5209 27520 bytes
SHA-256: d9b89e5bd5f701fd4deed69dcf97d9a7e0ae7262dfec6cab0fe16e28c6f0433c
font_01_sfnt_off0000914c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914C 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5B 18760 bytes
SHA-256: 2d07d7135cef577ff7a77d786dc8715fa5e801cdc90cb1da70a0df49ec6a84c0

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