Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebd5ec9755d37c5…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 03:08:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9352a440c4d2e1ab3663c69cfe047086 SHA-1: 0970e8e16306aee7ef4bcea339c300362a02e18e SHA-256: eebd5ec9755d37c507f5d8a249380efd44277779996f5c9e240a0ced3549cf8e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are SEO-optimized and point to sites offering game cheats and in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'ML_NYX_PDF_MALICIOUS' classifier strongly suggests malicious intent. The document body, though heavily obfuscated, contains URLs that align with the lure of game-related exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/hacking-galaxykittty_2021-on-roblox-game-hack
    • https://library.iuli.ac.id/repository/free-robux-ad_GM431946152.pdf
    • https://library.iuli.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://library.iuli.ac.id/repository/coin-master-70-spin-link_GM406889139.pdf
    • https://library.iuli.ac.id/repository/codes-admin-get-free-robux-roblox_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-spins-for-coin-master_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdf
    • https://library.iuli.ac.id/repository/free-group-roblox_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdf
    • https://library.iuli.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-spin-blogspot_GM406889139.pdf
    • https://library.iuli.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdf
    • https://library.iuli.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://library.iuli.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdf
    • https://library.iuli.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdf
    • https://library.iuli.ac.id/repository/roblox-lua-admin-script-cheat-engine_GM431946152.pdf
    • https://library.iuli.ac.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://library.iuli.ac.id/repository/free-robux-only-1-step_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-robux-codes-generator-no-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_off000054e1.bin
df207ea1c19f00383877f03c47c4438f1f17d27dfe4104a77e0ce534a0ac5251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E1 24204 bytes
font_01_sfnt_off00008c55.bin
f0060e9ab83a41480f9327b23e3377747699c0632c75a0e592dbed50078fd3eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C55 19308 bytes

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