Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfeb7b99282ca53…

MALICIOUS

PDF

42.9 KB
MD5: 6f8fbd10716440e49c4bc1adb022fb87 SHA-1: 0eb79cd65498f961a3d3d59eee9e54c55061367b SHA-256: 6bfeb7b99282ca5318ff3876384cd43dbf7303d9058aade071aa1203db4e80f2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV specifically detecting it as 'Pdf.Exploit.Agent-36830'. The presence of PDF_XFA and PDF_EMBEDDED_SCRIPT_PAYLOAD indicates that the PDF utilizes XFA forms and contains an embedded script, which is a common vector for exploiting client-side vulnerabilities. While the embedded script is obfuscated, its presence strongly suggests an attempt to download and execute a secondary payload, aligning with the 'Exploitation for Client Execution' MITRE ATT&CK technique.

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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
ab7a55c6fd12181a8295134bc7ea970c749a1ad729a42664eae3720043dff7ec		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43203 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.