Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9814237dcd523f…

MALICIOUS

PDF

41.0 KB Created: 2021-05-22 16:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 65da50d46b11b3c3c779816b46651363 SHA-1: 8aef689d44e410589b2ad8334b0d6c0d502706f1 SHA-256: dc9814237dcd523fb22d6fa45a372adefd8329710044f5811a192fb5722d56d4
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URL and other URLs point to resources that likely host further malicious content or exploits. The document's content and heuristics suggest a social engineering attempt to lead the user to download or execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7508

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/free-coin-master-spins-2021-game-hack
    • http://en.gzyuquan.com/Public/upload/editorfiles/minecraft-free-download-mac-full-version_GM479516143.pdf
    • http://en.gzyuquan.com/Public/upload/editorfiles/ways-to-get-free-robux_GM431946152.pdf
    • http://en.gzyuquan.com/Public/upload/editorfiles/roblox-com-r_GM431946152.pdf
    • http://en.gzyuquan.com/Public/upload/editorfiles/free-spins-from-coin-master_GM406889139.pdf
    • http://en.gzyuquan.com/Public/upload/editorfiles/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003407.bin
33e66612cc443e1ae076aae2e6fdd0c7a9f58083b1381e0d59e83ec36d754ea9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3407 23896 bytes
font_01_sfnt_off00006a70.bin
e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 8676 bytes
font_02_sfnt_off00007efa.bin
cbf21fc5c11f74798808ab0cc71af5e4bf323ced5a050f8983f0748b8c809d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFA 18288 bytes

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