Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01e8d1d4c6de10e…

MALICIOUS

PDF

36.0 KB Created: 2021-06-29 12:31:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bc231151f2c885ed3368d42bfea7a970 SHA-1: 9995ceb9642538488efba81c383e07c479076939 SHA-256: b01e8d1d4c6de10e2af2017d8c414a66b5706b9115c53fc2ff91219d58b21d39
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to redirect users to potentially harmful content. While no scripts were explicitly extracted, the structure and content point towards a phishing or malware distribution attempt.

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/free-roam-roblox-best-game-hack
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-tower-defense-hacked_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-easy-and-fast_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-hack-other-peoples-accounts-on-roblox_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-make-decals-free-roblox_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/give-me-robux_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/pubg-uc-qiymtlri_GM1330123889.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/hack-coin-master-iphone_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-skins-in-roblox-for-free_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-health-hack-cheat-engine-64_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/coin-master-pet-food-hack_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-new-indominios-roblox-buble-sim_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-minecraft-accounts-reddit_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032ba.bin
c45efa5bb8ddec7c9035c2c06eecc1bf0b258d5e71f554b475718b60543e56c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x32BA 23408 bytes
font_01_sfnt_off000067b0.bin
c3a265be9aef15a6fbcc366d1773b5706fe74571206be7fd8ce7e764c560196a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 19016 bytes