Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf43490bbab04b07…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 15:09:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 62e919038cd46827af2fd872594a44c3 SHA-1: a96269f255a286d2c41c6c1e38fd87a51b8fcd3c SHA-256: cf43490bbab04b07f9c2c590f09f4977ef2d5bb7fb5280958d3809bd57694228
82 Risk Score

Malware Insights

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

The document contains numerous embedded URLs and a call-to-action phrase, strongly suggesting a lure for downloading malicious content. The ML classifier also flagged this PDF with high confidence. The presence of a 'password-protected archive' heuristic indicates a common technique to bypass security scanning by encrypting the actual payload.

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/431946152/free-robux-games-on-roblox-game-hack
    • http://library.itekes-bali.ac.id/repository/roblox-hack-codes-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-make-free-shirts-on-roblox-without-bc-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-hack-no-survey-no-password-no-virus_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-fucking-get-free-robux-2021-real-omg_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/robux-online-hack-ml_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-lumber-tycoon-2-hack-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/como-hackear-cuentasen-roblox_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/youtube-robux-hack-html_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-gift-card-25_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-roblox-hair-codes_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/robux-hacks-that-actually-work-for-everyone-on-roblox_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-real-true_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-coins-coin-master-daily_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-hack-robux-for-free_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/daily-coin-master-free-spin-apk_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/secret-forums-released-free-robux-duplicator-100-working_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-land-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-hack-channel-art_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/generateur-de-robux-cheat-engine_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003008.bin
afca6c5e477fa6bfadeba4887e4dcb1ad0045d07ac22c7c7486731986cf3d284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3008 22420 bytes
font_01_sfnt_off000061ee.bin
56f4e65812c403ac511da7c683eb66c8172328fd08918d47063ad90a487708b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EE 19052 bytes

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