Malicious PDF — malware analysis report

Static analysis result for SHA-256 659e9566120d0230…

MALICIOUS

PDF

24.8 KB Created: 2024-08-31 15:48:33 -06:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.3)
MD5: 4efafe2dd9abb5b22b4f15a861b7c804 SHA-1: f954d1b1d13a5e4f62f108c9965707a2aa2a3c89 SHA-256: 659e9566120d02301b34aad279ca1bcb20855cf52b0bd1b67cf5f6f5b3c83f9e
62 Risk Score

Malware Insights

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

The PDF contains a direct link to a Windows executable hosted on GitHub, identified by the PDF_DIRECT_PAYLOAD_LINK heuristic. This executable, 'setup-qtox-x86_64-release.exe', is presented as a software installer, likely to lure the user into executing it. The presence of this direct download link strongly suggests a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0155

Heuristics 2

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • 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://github.com/qTox/qTox/releases/download/v1.17.6/setup-qtox-x86_64-release.exe
    • https://github.com/qTox/qTox/releases/download/v1.17.6/setup-
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001c94.bin
0a224902da875fa6989b9d25aa58179e14bfcee37c1f5bac75214721c865db86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C94 15536 bytes
font_01_sfnt_off00004472.bin
c55552675356dba83b0c503968be1b309ec75bb92fcfc88dcf6ba72f496290d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4472 12292 bytes

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