Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97b857ddd2add5a…

MALICIOUS

PDF

42.5 KB
MD5: 8535570b278d26672b49bea5666a3a85 SHA-1: 3a2298ac01af8429c2e51e68dbee78a3eee4255c SHA-256: c97b857ddd2add5a54680330b135efa4ecd36e24ae8030686974f47441650d70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 Malicious File

The PDF file contains embedded content and a script payload, as indicated by multiple heuristic firings including critical detections from ClamAV (Pdf.Exploit.Agent-36830). The embedded script is likely responsible for executing the malicious payload. While specific URLs are present, they are related to XFA schema and Adobe, and do not appear to be directly malicious in this context.

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
4ddd64208683d7586b3791f529b13c69eccdf8c28957cfacfc014152b83ae926		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42780 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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