Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf2b05a1b0d3d31…

MALICIOUS

PDF

42.3 KB
MD5: 36f485aae68c8d6dc9e68e16c3568018 SHA-1: bbde9bab2b25cacd492fcbe9a2fe78dec96f9f50 SHA-256: faf2b05a1b0d3d317ce96776f5921139dcd90b3b4df1ccf46a5a0648488ce1f1
186 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830, and a machine learning classifier also flagged it with high confidence. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting the PDF is designed to exploit vulnerabilities and deliver a secondary malicious artifact. The embedded URLs are related to Adobe XFA, a common vector for PDF exploits.

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
7a8f2b7802bf2e3f9eced9fe0d363aa04c572b3705479a4b11293d4ca4cb6f2a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42572 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.