Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc199c200c1c2544…

MALICIOUS

PDF

47.0 KB Created: 2021-06-11 09:44:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d6ea0e240f43468b525bd3ed2924c4d6 SHA-1: 709e7117a6eae15317e8991d89860b304df4da87 SHA-256: cc199c200c1c25443f065f06e932cfb15aca0c92fd52fd5d9de4b13fc9f32a34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA or human verification prompt, a common social engineering tactic to lure users into clicking malicious links. The embedded URI points to a website likely hosting further malicious content or exploits. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to lead the user to a malicious download or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/white-shirt-roblox-free-game-hack
    • https://c2o-library.net/catalog/repository/tiktok-free-comments_GM835599320.pdf
    • https://c2o-library.net/catalog/repository/androeed-ru-minecraft_GM479516143.pdf
    • https://c2o-library.net/catalog/repository/minecraft-free-download-android-apk_GM479516143.pdf
    • https://c2o-library.net/catalog/repository/hack-coin-master-2021_GM406889139.pdf
    • https://c2o-library.net/catalog/repository/free-spins_GM406889139.pdf
    • https://c2o-library.net/catalog/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdf
    • https://c2o-library.net/catalog/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/free-items-code-on-roblox-catalog_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://c2o-library.net/catalog/repository/minecraft-hacked-client-112-2_GM479516143.pdf
    • https://c2o-library.net/catalog/repository/roblox-btools-press-n-script-hack_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/free-roblox-code-generator-no-survey_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/coin-master-hack-apk_GM406889139.pdf
    • https://c2o-library.net/catalog/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • https://c2o-library.net/catalog/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/tutorial-hack-roblox_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/roblox-free-online-unblocked_GM431946152.pdf
    • https://c2o-library.net/catalog/repository/free-minecraft-client_GM479516143.pdf
    • https://c2o-library.net/catalog/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • https://c2o-library.net/catalog/repository/free-hero-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d2.bin
2c59320bc4916594a8f8e5ced5d82d8867b528b7f506346e0899e008cc66f86e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D2 25552 bytes
font_01_sfnt_off00008a70.bin
787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A70 2840 bytes
font_02_sfnt_off0000942e.bin
e944770f9381084818cb8c4ded25a4305d86e91b543a49b3aa83a9ac2d64f6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x942E 18536 bytes

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