Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4bc423b19ee12c…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 07:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 12a2296fddd1a8a14c9d7278a4c861e2 SHA-1: 1634ab9d2249fe4e0445aa709efd448ac27f22e0 SHA-256: 9d4bc423b19ee12c5fc5c162aaeb0e56b5b7ed3e93b49e657bae5ebaf4733350
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on a domain associated with game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a deliberate attempt to direct users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hacks-roblox-yt-game-hack
    • http://library.itekes-bali.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/free-spin-link-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-free-download-pc_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/hacker-que-banea-e-invisible-roblox_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-sites-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-free-download-for-windows-8_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-generator-hack-100-real_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-birthday-glitch_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/is-roblox-account-hacked_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-roblox-followers-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fa5.bin
dfb2d6fb3bd42d3719763a3ef4cf90c22899ded2aad6eaea0505d282446d5992
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA5 22148 bytes
font_01_sfnt_off000060d3.bin
a09e3d19c7aa067efc8cedcd134bcf8e498e5006bfed594b6c51a36c61890166
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 18924 bytes