Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fde30a204dff493…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 06:44:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9d2e7704a0e8273a197d419565533ea2 SHA-1: 1921fb5eb4b18b775b406d7286afddb081c27fb3 SHA-256: 5fde30a204dff4934f543d3a18dde300521eb627d73fc0d0aca5b21d2f8aff34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to obtaining free coins for the game Coin Master, directing users to a URL that likely hosts a malicious payload. The presence of embedded URLs and a high ML classifier score indicate malicious intent. The document also contains a heuristic for a password-protected archive lure, suggesting a multi-stage attack.

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/how-to-get-free-coins-in-coin-master-game-game-hack
    • http://library.unissula.ac.id/fe/repository/roblox-case-clicker-cheats_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-hack-any-roblox-game_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/tiktok-free-login_GM835599320.pdf
    • http://library.unissula.ac.id/fk/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/free-items-for-kids-on-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-get-robux-in-roblox-cheat_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-email-and-password-hack_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/minecraft-download-free-download_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/get-free-robux-easy-and-fast_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/game-toolbox_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/coin-free-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/coin-master-cheats-free_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/minecraft-pe-free-download-ios_GM479516143.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spin-and-trading_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/free-roblox-dances_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-app-real_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/blox-fish-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/is-roblox-on-switch-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003376.bin
85f523abcb1af2d39d4d7ace7160034f9d3701e6110d5ee7ef262d7d8847eb87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3376 22380 bytes
font_01_sfnt_off00006503.bin
2d9447480b9e6b84fb585e3b568d723d862a2a90c2fba975df7521df3b865f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6503 18420 bytes

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