Malicious PDF — malware analysis report

Static analysis result for SHA-256 b950411169cfdd4e…

MALICIOUS

PDF

49.7 KB Created: 2021-06-07 13:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 75c51fc3c0a173017ca08b18e2a991db SHA-1: b0dde4e7a819ec1ee7c8d2490c81467daabe7fd3 SHA-256: b950411169cfdd4e15be91ca9dbd90d52a6172559d9b0282ddff5d5cf8835622
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document employs a fake CAPTCHA lure to trick users into downloading a payload, likely game cheats. The embedded URL https://netcdn.tw/app/431946152/hack-strucid-roblox-game-hack is the primary indicator of malicious intent, suggesting the document is a lure for malware distribution. No scripts were extracted, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

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.tw/app/431946152/hack-strucid-roblox-game-hack
    • http://www.compusiteinc.com/images/hacks-and-cheats-for-coin-master_GM406889139.pdf
    • http://www.compusiteinc.com/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdf
    • http://www.compusiteinc.com/images/how-to-earn-free-robux_GM431946152.pdf
    • http://www.compusiteinc.com/images/robux-today_GM431946152.pdf
    • http://www.compusiteinc.com/images/agents-roblox-hack_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-coin-master-account_GM406889139.pdf
    • http://www.compusiteinc.com/images/free-24-7-minecraft-server_GM479516143.pdf
    • http://www.compusiteinc.com/images/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://www.compusiteinc.com/images/coin-master-free-spins-2021-blogspot_GM406889139.pdf
    • http://www.compusiteinc.com/images/roblox36com-free-robux_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-robux-app_GM431946152.pdf
    • http://www.compusiteinc.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • http://www.compusiteinc.com/images/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-robux-website_GM431946152.pdf
    • http://www.compusiteinc.com/images/village-3-coin-master_GM406889139.pdf
    • http://www.compusiteinc.com/images/can-you-download-minecraft-for-free_GM479516143.pdf
    • http://www.compusiteinc.com/images/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://www.compusiteinc.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://www.compusiteinc.com/images/infinite-essence-roblox-booga-booga-hack-2021-october_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005041.bin
aacbb8e0abb932362f6cf7d39ef2341e6e85df456fa969799a19db505649a228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5041 24244 bytes
font_01_sfnt_off0000874f.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x874F 2840 bytes
font_02_sfnt_off000090fc.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90FC 5596 bytes
font_03_sfnt_off00009da4.bin
519d8b12bf6e51c3252dddefff9a956faeda68f3392ca572f4784d125ebbece1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA4 18720 bytes

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