Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a3c2d71659aad4…

MALICIOUS

PDF

42.5 KB
MD5: 3c513d8700d8180b7450b0bac6236ed2 SHA-1: cb873744ec0440701c6baaae3a9d2293a5f73bc9 SHA-256: b6a3c2d71659aad451ea538bfe99b336e19558a04b1545098ff3c452330aed15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The critical ClamAV heuristic firings indicate this PDF is malicious, specifically detecting it as 'Pdf.Exploit.Agent-36830'. The PDF contains embedded content and scripts, suggesting it's designed to exploit a vulnerability and deliver a secondary payload. The embedded URLs are related to Adobe XFA, which has been a target for exploits.

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/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
e468ad31522649a61867ba06d748493efc386e375e082709bae085a345ef7ff2		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42725 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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