Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e724a9b2b74defd…

MALICIOUS

PDF

45.9 KB Created: 2021-05-15 13:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: edcb1ce39cbc2d4df2eca2341e4afa2b SHA-1: c10a13f75c272b7da6d5a039e16f444feca5f4e4 SHA-256: 8e724a9b2b74defd183db35d72ddffbc7f10a58f1b2ec1a51b17bc04a318944d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URIs pointing to potentially malicious content, such as 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-for-free-game-hack'. The presence of these elements strongly suggests an attempt to deliver a second-stage payload, likely through a malicious link or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-for-free-game-hack
    • http://www.adudubai.com/uploaded_files/userfiles/files/coin-master-spins-hack_GM406889139.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/roblox-free-robux_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/uprobuxcom-free-robux_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/wurst-commands_GM479516143.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/roblox-heroes-online_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/roblox-hack-apk_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-minecraft-skins_GM479516143.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/minecraft-free-download-android_GM479516143.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-spins-coin-master-links-blogger_GM406889139.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/earn-free-robux-today_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/how-to-get-free-roblox_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-robux-pins_GM431946152.pdf
    • http://www.adudubai.com/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000477f.bin
44d02d9c88a61fdd57d3108794ddc58d535dad175c6e4925a75bfbb73f8a2dd3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477F 33676 bytes
font_01_sfnt_off00009142.bin
2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9142 18280 bytes

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