Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f42cab3ce74673…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 02:24:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ae68a7ae60c7d4c08cd0c9e9de7fd8f0 SHA-1: bff0baebb29542db5b64a660aa3209fbf6f48414 SHA-256: c9f42cab3ce746737538585d9a8dc8d52cbd4d8a2639efd63b1fe6ddba17f81a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous embedded URLs, with the primary one being http://netcdn.tw/app/406889139/free-spins-coin-master-links-blogspot-game-hack, which is likely a lure for game-related cheats or currency. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick users into providing a password for an archive, potentially to bypass security filters. The ML classifier strongly flags this PDF as malicious.

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/free-spins-coin-master-links-blogspot-game-hack
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-free-robux-hack_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-get-minecraft-java-free_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-card-with-free-virtual-item_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/best-minecraft-hacks_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/www-free-robux-com_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-save_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-get-tiktok-famous-free_GM835599320.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-executor-free_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-login-hack_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-spin-free_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/get-free-spins-coin-master_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/can-simeone-hack-your-roblox-account-theough-discord_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/boku-no-roblox-hack_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/jailbreak-way-to-get-free-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-obby-gives-you-free-robux-july-no-password-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000331a.bin
6f749023da559f889183aa6bb78a0dba28f5f37152810fcc32fd03ecadf70c6a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331A 22360 bytes
font_01_sfnt_off000064d5.bin
3bd5d70d92567c4e9fdab6ab0c4abb83fff73585d00d870a94bf54a7db3788b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D5 18632 bytes

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