Malicious PDF — malware analysis report

Static analysis result for SHA-256 400bdc7c608744a5…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 23:05:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bdb09fea7b7c53a031a3d28f7428bf30 SHA-1: 7cc33e14e6f2e902dd01bd818ee61858ad8ae7db SHA-256: 400bdc7c608744a5a640f4f8750c794485fbea2f3e581e66ae3f8b6e10f81683
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to external PDF files with SEO-optimized titles related to game hacks and cheats. The primary URL, http://netcdn.tw/app/431946152/roblox-hack-download-game-hack, suggests a download lure. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to distribute malware or lead users to phishing sites.

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/431946152/roblox-hack-download-game-hack
    • http://stmb-multismart.ac.id/perpustakaan/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/all-code-is-hacking-simulator-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-tricks_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-noclip-using-cheat-engine-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-death-sound-free-download_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-spin-coin-master-online_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/before-dawn-hack-roblox-pastbin_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/como-tener-hacker-en-el-hospital-de-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-auto-clicker-free_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-script-hack-get-everything_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-generator-2021_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-roblox-hack-tool_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-roblox-with-kali-linux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-robux-for-free-for-children_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-gift-card-codes-2021-april_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-jailbreak-hack-application-free_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/minecraft-xray-hack_GM479516143.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-cards_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7b.bin
0fbb079204400b63590c9d53a1b8bf6cf050159effd71451167f42f51b221968		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7B 22704 bytes
font_01_sfnt_off00006219.bin
20e8ef43e122870d61f5f3bdc7785651657b4c6f8223466300bbb50b4def8f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6219 19160 bytes

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