Malicious PDF — malware analysis report

Static analysis result for SHA-256 1131e5a456d24215…

MALICIOUS

PDF

42.3 KB
MD5: 0fab5ad7928454eac94074febe188e27 SHA-1: 1268730c39b9e55d64fa1a72290e382a8e454d39 SHA-256: 1131e5a456d242157ec9be7de4c592d11655d3e5b0b805bb365f2b7e88ad4291
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is identified as malicious by multiple high-severity heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). It contains embedded files and scripts, typical of exploit-laden PDFs designed to execute arbitrary code upon opening. The presence of XFA forms and embedded scripts suggests an exploit targeting PDF reader vulnerabilities for initial execution.

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 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 script payload in PDF stream low 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 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 0xC6 46 bytes
embedded_file_obj0009.bin
872b6059a4595d2223a3499f483251ba8b4c3be77672fbe7269853ada7d175ca		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 687 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x436 168 bytes
embedded_file_obj0011.bin
c29299b1dbc83d257988c38284ee57b4c52aee7ef711112419cff6f406586a80		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x529 444 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x730 190 bytes
embedded_file_obj0014.bin
2522b2c6b63c5da21b76a65f5c53a776675b8e3b316512e3a997c2a3430861e5		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x83B 40546 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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