Malicious PDF — malware analysis report

Static analysis result for SHA-256 41294ddba6c62126…

MALICIOUS

PDF

42.4 KB
MD5: 2a8ba7a466b97bb6a9d6a5091db68e0a SHA-1: 3008887b5b5c724143e8d1c741c2e486d77c4aa4 SHA-256: 41294ddba6c62126fa18af29bf2ec2fcd4c7d90c17a02fb5275066d93ce56cbc
188 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830, and an ML classifier also flagged it with high confidence. The PDF contains embedded files and an embedded script payload, indicating it is designed to exploit vulnerabilities and deliver further malicious content. The embedded URLs are related to XFA forms, which are known to be exploited.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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 http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
155564df9eaf3dfb05f5158715509f030c8207a95dcad1c5c795f4626eacc67d		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 168 bytes
embedded_file_obj0011.bin
8cd968f6356720658f17ad7262816d6eba79f3c7847dc40d6d13c5f5fbd634a8		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x53C 433 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x738 190 bytes
embedded_file_obj0014.bin
f562750c381753cbab2bd4e23f2b8107cf9e24f79d13215608602df6f3227c5c		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x843 40587 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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