Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba3499279e2a433…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 14:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 48a6887e1c70b6647c87e1756cd1fa07 SHA-1: be6fcb97096725bbaf14f6e14c8dc5cb7fd277b2 SHA-256: 8ba3499279e2a43397e0539539beabf5b46e70bec861861bcc09b9ba6153a0cc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to resources related to popular games like Roblox and Minecraft, suggesting a lure for users seeking in-game currency or cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of external links, and the ML classifier strongly flagged this PDF as malicious. The presence of a download button lure further supports a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/roblox-voohack-com-free-robux-game-hack
    • http://casabea.de/images/minecraft-games-free-to-play-online_GM479516143.pdf
    • http://casabea.de/images/can-i-get-minecraft-for-free_GM479516143.pdf
    • http://casabea.de/images/coin-master-spin-link-free_GM406889139.pdf
    • http://casabea.de/images/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://casabea.de/images/coinmaster-free-spins-link_GM406889139.pdf
    • http://casabea.de/images/websites-that-give-free-robux_GM431946152.pdf
    • http://casabea.de/images/cheat-engine-roblox-for-robux_GM431946152.pdf
    • http://casabea.de/images/minecraft-apk-free-download_GM479516143.pdf
    • http://casabea.de/images/free-promo-codes-roblox-2021_GM431946152.pdf
    • http://casabea.de/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://casabea.de/images/free-robux-easy-and-fast_GM431946152.pdf
    • http://casabea.de/images/roblox-free-robux-generator-online-no-survey_GM431946152.pdf
    • http://casabea.de/images/how-to-download-minecraft-for-free_GM479516143.pdf
    • http://casabea.de/images/free-roblox-usernames-and-passwords_GM431946152.pdf
    • http://casabea.de/images/who-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://casabea.de/images/minecraft-free-online_GM479516143.pdf
    • http://casabea.de/images/free-spin-codes-coin-master_GM406889139.pdf
    • http://casabea.de/images/free-robux-without-any-verification_GM431946152.pdf
    • http://casabea.de/images/coin-master-apk-hack-download_GM406889139.pdf
    • http://casabea.de/images/coin-master-links-free-spins_GM406889139.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd9.bin
de153616ee59a2ecb56c607481f35635ce5092825a08d2f225c4ea10ba92952b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 22236 bytes
font_01_sfnt_off00006127.bin
e0359ad8c8da91bd85b47ea6a0effa7da9574a52e5200ce49a3a5f204529dab8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 19520 bytes