Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c8734bfff3c4dd…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 18:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8ebcda11a01635611cf105f42b9ca157 SHA-1: ded36f413745ced74d0a33042787be460474e47b SHA-256: 24c8734bfff3c4ddc82e2ccf24709c6040bd8a7eaeed76a1c0bb0314208c529a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and free items. The primary URL, https://netcdn.xyz/app/431946152/free-robux-without-verify-game-hack, suggests a lure for obtaining Robux, a virtual currency. The presence of a 'Visual download / call-to-action button lure' heuristic further supports the intent to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-without-verify-game-hack
    • http://fairwaygolftravel.co.uk/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/windows-10-minecraft-hacks_GM479516143.pdf
    • http://fairwaygolftravel.co.uk/images/how-to-get-free-things-on-roblox_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://fairwaygolftravel.co.uk/images/how-to-get-more-robux_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://fairwaygolftravel.co.uk/images/coin-master-free-spins-link-today-twitter_GM406889139.pdf
    • http://fairwaygolftravel.co.uk/images/minecraft-free-version-pc_GM479516143.pdf
    • http://fairwaygolftravel.co.uk/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdf
    • http://fairwaygolftravel.co.uk/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdf
    • http://fairwaygolftravel.co.uk/images/www-roblox-com-robux-free_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/how-to-buy-robux-for-free_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://fairwaygolftravel.co.uk/images/easy-how-to-get-free-robux_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/robux-scam_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/coin-master-game-for-pc-free-download_GM406889139.pdf
    • http://fairwaygolftravel.co.uk/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/free-roblox-intros_GM431946152.pdf
    • http://fairwaygolftravel.co.uk/images/coin-master-hack-2021-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c27.bin
16dfb4ed1f1b5ba723f4b0c5edfe0733ff93614e7ff8d120872e65f84bad0fd2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C27 25424 bytes
font_01_sfnt_off0000868d.bin
511fbd4ba16aacf51779f52d01f2fc894dffaba514ce449b994b41b42032bc0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868D 18916 bytes

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