Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1001e0d91bea03a…

MALICIOUS

PDF

42.6 KB
MD5: b16d2294394889b8f62f6c856d62ed9a SHA-1: 6e7d6b493e8e2d88b7ae398d804660bcc998c124 SHA-256: e1001e0d91bea03a941f2d876a28f60a5c88063213959d1241b23a719807f8b0
226 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a high-severity XFA form with risky executable script content, as indicated by multiple heuristic firings. ClamAV detection of 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact strongly suggests exploitation of a known PDF vulnerability. The embedded script is likely responsible for the malicious payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

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
5830aadb675e27760149a4367bef0b7732ed3df7cb4e1f29e226d4a2b9253817		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 687 bytes
embedded_file_obj0010.bin
982e20dbb278e7bb9167a49d41bca4eba40d0f35d12088fdf01e6cb6fead89b4		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x447 165 bytes
embedded_file_obj0011.bin
67568b360cfaeb071bae4232b78f38ae1584dbc3f071593d5bd90e5e937573ad		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x537 422 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x728 190 bytes
embedded_file_obj0014.bin
0bccef74f652dfd21f2dc4630b91a29c6d5e41e6053ff516ff275f100583be35		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x833 40833 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA7FE 68 bytes

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