Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e56b5d2ce413ea5…

MALICIOUS

PDF

41.9 KB
MD5: d8114fc624e24e26fc57bc4f6b3bb8e0 SHA-1: b45a6007e44fc0656763e0eb40a0cd6ed425c0ca SHA-256: 5e56b5d2ce413ea5ab5cefdbe41dd9bb1a740a4785a4ca9e99193098c1747b2f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Exploit.Agent-36830. It contains an embedded script payload and an embedded file, indicating it is designed to exploit vulnerabilities and execute further malicious code upon opening. The presence of XFA form elements suggests a potential avenue for exploit.

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
897366a8d043b883edd96478b2dec1d998b03d9b7ebc842e591504417e465b61		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42184 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.