Malicious PDF — malware analysis report

Static analysis result for SHA-256 443d316b04dca8f8…

MALICIOUS

PDF

33.6 KB Created: 2021-06-26 05:27:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 99c511ebbf9d588386394640efb069a1 SHA-1: be752ebe8799d6a7980ebabc911df061886933d6 SHA-256: 443d316b04dca8f8dcb4257b74eb9486bf5ac853a53e22adfe8555a93c8110c8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly promises game hacks and cheats, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed for malicious distribution. No scripts were extracted, but the presence of external URIs and the document's content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/confiscation-roblox-hack-game-hack
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-one-step_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-free-ios_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-robux-hack-2021-august_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/robux-for-free-for-robloxcom-mobile4free24com_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-and-tix-generator-no-survey-or-download_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/earn-robux-now_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/do-people-hack-into-roblox-servers-and-watch-u_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/pokemon-go-free-offers_GM1094591345.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-unused-roblox-codes_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-cheats-november-2021-dll_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-source_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-views-tiktok_GM835599320.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/como-hackear-coin-master_GM406889139.pdf
    • http://upes.edu.sv/ckfinder/userfiles/files/get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030bb.bin
732248f90edf90b6fee51715a2c2ac6e5440295fe14597fc12498d369cfb9a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30BB 21300 bytes
font_01_sfnt_off00005eb5.bin
1e4b910c413b67a409bfd07cddc82441e1cc9f78e45a309965e25ad11525c2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB5 18880 bytes

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