Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cc6850cc7d106c…

MALICIOUS

PDF

33.4 KB Created: 2021-07-08 17:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ff74dc4a85a690dffe573fe40f168c22 SHA-1: 1d0bc3d7c285831d7a5168ad176f5c4164a62a8f SHA-256: c4cc6850cc7d106ccb854d676cdd9e5895f9b526919b67666b77a2a0a1c7772b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to game hacks, embedding numerous links to external PDF files, many of which are also related to game cheats or exploits. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious intent. The primary goal appears to be directing users to a link farm that likely hosts further malicious content or phishing pages.

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.tw/app/479516143/how-to-get-hacks-on-minecraft-game-hack
    • https://www.ashkarco.com/uploaded_files/userfiles/files/como-ser-un-troleardor-en-roblox-sin-ser-hacker_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-rogue-lineage-for-free-roblox_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-cheat-2021_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-roblox-premium_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-hack-super-jump-on-roblox-phantom-forces_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-a-free-dominus-hat-on-roblox-2021_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/redline-hack-roblox-mega_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coinmaster_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/pokemon-go-windows-free-download_GM1094591345.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-avatar-com_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-exploits-roblox-2021_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-spam-sentenace_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f83.bin
b084696f25a6dc9190ef3a6399df574d42813252d96693d86a1403807c4db869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F83 21788 bytes
font_01_sfnt_off00005f8a.bin
7074210b4cd1020dcfe52daa4947dc8d4893434919d69b6619189279454e1a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 18332 bytes

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