Malicious PDF — malware analysis report

Static analysis result for SHA-256 beea83a0af24dfee…

MALICIOUS

PDF

45.2 KB Created: 2021-06-13 15:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b54d6dc76ee7ee1e4df977c85a1281fd SHA-1: 650a57ae4761cd6eee1d20cb2aca0219984942fb SHA-256: beea83a0af24dfee525f79f1e0ccb2a40e3459108f96d8637debea5004c08fdd
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 game cheats and hacks, specifically for Roblox and Minecraft. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious download sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification. While no scripts were explicitly extracted, the nature of the content and the embedded URLs strongly suggest an attempt to trick users into downloading malware disguised as game cheats.

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 http://netcdn.co/app/431946152/roblox-cheat-hack-download-game-hack
    • http://fccsms.com/images/robux-generator-without-human-verification-2021_GM431946152.pdf
    • http://fccsms.com/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://fccsms.com/images/minecraft-on-computer-free_GM479516143.pdf
    • http://fccsms.com/images/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://fccsms.com/images/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://fccsms.com/images/wewgaming-hack-roblox_GM431946152.pdf
    • http://fccsms.com/images/play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://fccsms.com/images/free-spins-coins-coin-master_GM406889139.pdf
    • http://fccsms.com/images/get-free-robux-2021_GM431946152.pdf
    • http://fccsms.com/images/minecraft-free-minecoins_GM479516143.pdf
    • http://fccsms.com/images/roblox-download-and-play-for-free_GM431946152.pdf
    • http://fccsms.com/images/how-you-get-free-robux_GM431946152.pdf
    • http://fccsms.com/images/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://fccsms.com/images/how-to-get-more-followers-on-tiktok-free_GM835599320.pdf
    • http://fccsms.com/images/coin-master-hack-mod-game-download_GM406889139.pdf
    • http://fccsms.com/images/free-minecraft-mods_GM479516143.pdf
    • http://fccsms.com/images/free-working-robux_GM431946152.pdf
    • http://fccsms.com/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://fccsms.com/images/free-robux-generator-for-kids_GM431946152.pdf
    • http://fccsms.com/images/mcpe-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ffe.bin
dc01e0723a389d4c9e5c673709673ccf7e7643950df8f9c2fa7d167766b750cb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFE 25948 bytes
font_01_sfnt_off00008bee.bin
b215df32cd9ff4a7caf53a295aa63374ae9a2c26b7f7bb7aa62c87d475fa82ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEE 18956 bytes