Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e850b11465e951…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 09:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 57b448bd9ce5b30ee5ac82c413f59b98 SHA-1: ff9e93329fa499e1b6606ac61643ac9c331d71f2 SHA-256: e8e850b11465e951e6bd12d08923821de9e6dd2dc0b1a08aa9dd10dd00163a8a
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to external resources related to games and hacks. The primary URL, http://netcdn.tw/app/835599320/tiktok-free-advertising-game-hack, suggests a lure for potentially malicious content. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, reinforcing the malicious intent of directing users to potentially harmful sites.

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.tw/app/835599320/tiktok-free-advertising-game-hack
    • https://opac.umrah.ac.id/repository/bux-gg-free-robux-2021_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/hack-icebreaker-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/hack-cruise-ship-tycoon-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/free-roblox-stuff-2021-promocodes_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-hack-guns-in-apocalypse-rising-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/my-account-got-hacked-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-swordburst-2-speed-hack_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-robux-codes-unused_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-domain-for-minecraft-server_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/cheat-phantom-forces-roblox-2021-level_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/c-face-get-for-free-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-phantom-forces-flame-cheat_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-fly-hack-on-roblox-2021_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-admin-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-roblox-fedora_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-roblox-accounts-not-used_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000309c.bin
4059e23bfbd5b547dccad70563b56eaaf23a8a2e911464fab2550b4f371aea3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 21756 bytes
font_01_sfnt_off00006056.bin
9a9d63a99053f77f69a0e5ba3309f435383e683cdcc4a9025a855be26c8a9fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 18260 bytes

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