Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7216b9269d4ce5…

MALICIOUS

PDF

33.9 KB Created: 2021-06-28 15:52:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f528715b65b47a8f078b7376a2d235dc SHA-1: bca83921faa30816c23589fb6c10932eab74da1e SHA-256: 3f7216b9269d4ce5872b5656831eb16f049c4d6e19d7c4bb28c3ec0fcb120cb0
102 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which are presented as download lures for popular games and in-game items. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious with high confidence. The presence of these links and the overall structure point towards an attempt 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-girl-hairs-free-game-hack
    • http://educhina.mn/editor/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
    • http://educhina.mn/editor/files/wix-site-free-robux_GM431946152.pdf
    • http://educhina.mn/editor/files/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • http://educhina.mn/editor/files/husky-roblox-free-robux-link_GM431946152.pdf
    • http://educhina.mn/editor/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://educhina.mn/editor/files/how-to-hack-into-somones-account-roblox_GM431946152.pdf
    • http://educhina.mn/editor/files/free-robux-without-offers_GM431946152.pdf
    • http://educhina.mn/editor/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://educhina.mn/editor/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://educhina.mn/editor/files/robux-com-free-robux_GM431946152.pdf
    • http://educhina.mn/editor/files/free-dominus-roblox-2021_GM431946152.pdf
    • http://educhina.mn/editor/files/roblox-free-login_GM431946152.pdf
    • http://educhina.mn/editor/files/synapse-x-download-free-roblox_GM431946152.pdf
    • http://educhina.mn/editor/files/cool-free-outfits-on-roblox_GM431946152.pdf
    • http://educhina.mn/editor/files/coin-master-spin-and-coins-free_GM406889139.pdf
    • http://educhina.mn/editor/files/minecraft-free-ios_GM479516143.pdf
    • http://educhina.mn/editor/files/haktuts-free-spins_GM406889139.pdf
    • http://educhina.mn/editor/files/can-i-have-free-robux_GM431946152.pdf
    • http://educhina.mn/editor/files/scaffold-minecraft-hack_GM479516143.pdf
    • http://educhina.mn/editor/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ebe.bin
4d06f3bbe9d00d5d2a07a047d1c65997848154278c86e690dbcc37d094ef5e6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBE 22224 bytes
font_01_sfnt_off0000602f.bin
18918905a4ceff22e37d673f9b2c8c269ad2c693aa2c4ca8224ef6e3d252d683
pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 18768 bytes