Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab424eec77f9fcc…

MALICIOUS

PDF

35.3 KB Created: 2021-06-17 19:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7437097d342690b3478896b668993dd2 SHA-1: ee667d72bad584ba19936cb8b1eb1b35c4de0255 SHA-256: 4ab424eec77f9fcc49c37a2f4319c81a13f18f653a15f215dd641137ac3d8a0a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are related to game hacks and free in-game currency, suggesting a lure for users seeking such items. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may instruct users to execute commands, likely to download and run a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/free-roblox-codes-2021-game-hack
    • http://prazdnik-kzn.ru/images/flamegg-hack-robux_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/life-hacks-for-robux_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/rbx-free-robux_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/chisel-and-bits-mod-pe_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/minecraft-pe-free-apk_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/coin-master-claim-free-spins_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/free-trello-gold-roblox_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/get-free-followers-on-tiktok_GM835599320.pdf
    • http://prazdnik-kzn.ru/images/how-to-git-free-privert-servers-in-roblox_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/roblox-dominus-free_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/free-robux-without-human-verification-real_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/mcpe-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003131.bin
7f02d4f1872093f87962f167da735c384761c2fcf6bc0eee25df7e9d18648dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3131 22924 bytes
font_01_sfnt_off000064a6.bin
007e356d1fc8e910523930615741fff469617cfc35e1a90f0017cb3080d9eb0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A6 19040 bytes

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