Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ff98479c4bcf0d…

MALICIOUS

PDF

32.6 KB Created: 2021-07-05 16:03:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a417f31cf314bdba68cd38b5184943f6 SHA-1: ac11fb2650bd018faf9486f3c264c6e52e884524 SHA-256: 91ff98479c4bcf0dd7578d5f8249cf5e9b72330722dd8a381ac4f44e4ffa2a64
82 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, and an external URI pointing to a game hack download was found. The document body contains numerous links to similar game-related cheats and hacks, suggesting a lure to download a malicious payload. The presence of a 'password-protected archive' heuristic further supports the idea that the user is being tricked into downloading an encrypted malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/coin-master-homepage-game-hack
    • http://library.unissula.ac.id/fk/repository/tiktok-free-view-iphone-survey_GM835599320.pdf
    • http://library.unissula.ac.id/fk/repository/robux-generator-without-verification_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/roblox-shinobi-life-cheats_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-pastebin-console_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-username-and-password-in-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/roblox-fun-com-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/apps-for-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/hack-robux-2021-free_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-noclip-hack-script_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/huskybuckscom-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/cool-free-minecraft-skins_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-profile_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/aristois-minecraft-hack_GM479516143.pdf
    • http://library.unissula.ac.id/fe/repository/roblox-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-robux-scam_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-trick-2021_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/robux-sites_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/free-tiktok-email-and-password_GM835599320.pdf
    • http://library.unissula.ac.id/fk/repository/obby-games-on-roblox-free-online-games_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-heaven-free-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cb5.bin
3d036d98418ddff737901abee3eb73fda1a7822a11ccef9ee82c18e7904f826a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB5 21824 bytes
font_01_sfnt_off00005cb8.bin
4f50b080c0e0e9872089a20b246d15d020aeff6e057a645923069bcd0b94099b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB8 18272 bytes

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