Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcd7c126a0ac5c5…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 22:32:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: adcb0a0ad6c6d3df93d27cbfdcafc88d SHA-1: 75c2d1e74f52cce9f7ca5523b3be7852fa88455d SHA-256: 2bcd7c126a0ac5c563fcc0e1cd4d77eadd83356b1975d445d7f3882c3f9be353
82 Risk Score

Malware Insights

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

The ML classifier and the 'Fake CAPTCHA' heuristic strongly indicate malicious intent. The document likely uses a fake CAPTCHA to trick users into clicking embedded links, such as the one pointing to 'netcdn.xyz', which is designed to lead to further malicious content or downloads. The presence of numerous similar URLs further supports this phishing and potential malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/how-to-create-group-in-coin-master-free-spins-game-hack
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/get-free-robux-info_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-no-survey_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-32-hack-apk-download_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-land-free-robux_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-hack-tool_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-minecraft-account-reddit_GM479516143.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/aternos-free-minecraft-server_GM479516143.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/free-coin-spin-daily-link-net_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/reddit-coin-master-free-spins_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/google-roblox-games_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bc8.bin
208d4efd91b2d04c103c618f56b95c5d949c15048ec2a1f8f1093e7da8e232e3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC8 23932 bytes
font_01_sfnt_off00008226.bin
214f541c49ef2ca421d67462486d7476b6aace0078e47079ad7f1e2427fd8839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 18188 bytes

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