Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00b295b0dcf67b3…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 20:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8e8efbd06562d9bcfa3505492959567d SHA-1: e2671cd6767c4c3fb3d0cc008ca52970024e2ac9 SHA-256: a00b295b0dcf67b301673b98ea7d7a12b217c1c98bb2e0a3748e4a4058f5aafe
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure and an embedded URL pointing to a suspicious domain, indicating an attempt to trick the user into downloading a malicious payload. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, limiting the ability to determine the exact nature of the payload.

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/431946152/free-robux-without-verification-game-hack
    • http://elibrary.perludem.org//repository/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://elibrary.perludem.org/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdf
    • http://elibrary.perludem.org//repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/best-free-robux-sites_GM431946152.pdf
    • http://elibrary.perludem.org//repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://elibrary.perludem.org//repository/coin-master-hack-app-android-download_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/how-to-earn-robux-fast_GM431946152.pdf
    • http://elibrary.perludem.org/repository/free-robux-app_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://elibrary.perludem.org//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-hack-2021_GM406889139.pdf
    • http://elibrary.perludem.org//repository/master-coin-hack-apk_GM406889139.pdf
    • http://elibrary.perludem.org/repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/roblox-hack-site_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004993.bin
a92957cdcf1b78cfacc38a984d821e01aac8c0625a57c75d62b287391809aea0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4993 24568 bytes
font_01_sfnt_off0000824f.bin
5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 18964 bytes

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