Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0469440a5d82db8…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 22:34:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3fb16b5ae3b83685f07ce215e82d6645 SHA-1: debfcc8e0c7f9904c816d4cddb9be7f966ddc1a5 SHA-256: d0469440a5d82db83c50487cea288ec1ee28075e7308474f91453bfd4de3d310
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes 'hacks' for popular games, indicating a lure for users to download further content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies a large number of external links, many of which are structured as SEO-friendly PDF links, suggesting a link farm designed to attract traffic. 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.tw/app/431946152/easy-robux-hack-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-for-free-apk_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/assasin-roblox-sccript-hacks_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-generator_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-foxy-food_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-game-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-on-computer-for-kids_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-studio-20-beta-download-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/best-roblox-free-roblox-avatar_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/hacking-money-in-vehicle-sim-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/bloxpink-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-hack-2021-pastebin_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-trainer-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000302e.bin
e40efa4ac1e89c828dc519507f0c247be72dda65105893a6f411129e6f7b2075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x302E 22896 bytes
font_01_sfnt_off000063a8.bin
32648cf306b4f00444b6c2d1e7dcc2fb61b683822ede0ce90a64c4c32cbbd517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 18900 bytes

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