Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca1a7172115bc6f…

MALICIOUS

PDF

42.8 KB
MD5: c9dd81911cba18ae1f49cb0ab5b101d6 SHA-1: 716f254a272cc848833eac566791357f2a31d69e SHA-256: 2ca1a7172115bc6f6380063cd341ea1864e7c5f10dab4432c9e48ee6590544c7
186 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Agent-36830) and an ML classifier. An embedded script payload was also identified, indicating the file is designed to execute malicious code upon opening. The embedded artifact further supports the malicious nature of the document.

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 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
3a726e0e0d311e60f00c13fe29bf7ebe27a1097ee33f74b7937be5bfcd59c5eb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43070 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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