Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb3f4f7590a59fa…

MALICIOUS

PDF

33.6 KB Created: 2021-06-28 20:27:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d08bda668d11257550550475132f4ecd SHA-1: b5faef32e07a21b539535c77a70c41173e31a414 SHA-256: 5cb3f4f7590a59fa7f64c1ce5d3b75d6c6db1f14b259f170f96fcc2d6196f9bb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, including one pointing to 'netcdn.co', which likely serves as a lure for downloading game cheats or generators. The presence of a 'Password-protected archive handoff' heuristic suggests that the downloaded content may be encrypted to evade initial security checks. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.co/app/431946152/rememe-cheat-roblox-game-hack
    • http://akbidprimahusada.ac.id/elibrary//repository/robux-generator-no-survey_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/minecraft-for-ipad-free_GM479516143.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-ios_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/rblx-city-free-robux_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/free-robux-generator-no-human-verification-fpr-real_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-download-speed-hack-on-roblox_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/free-spins-coin-master-2021_GM406889139.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/robux-free-tips-apk_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-vehicle-simulator-hacks-2021_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/aplicaciones-de-hacks-para-roblox_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/free-robux-khaos_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/minecraft-free-download-iphone_GM479516143.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/minecraft-dungeons-free-download_GM479516143.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/minecraft-beta-free_GM479516143.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/free-robux-no-downloading-apps_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-site-hacked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb3.bin
e82c0456c0686c2f0a0f748674a2f88fedf0f98ac21fa173c5215eb8496460cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 21732 bytes
font_01_sfnt_off00005e4d.bin
e10c7d9fc4b6e11c8e851571d02509f7b2093e7143d66587da34437d35422116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 19016 bytes

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