Malicious PDF — malware analysis report

Static analysis result for SHA-256 685ddcd3e66b4eaf…

MALICIOUS

PDF

42.6 KB
MD5: 3b75453c20b6315f676d31bdfe7344d5 SHA-1: 8b9180e77e71d01235be6ba1050bb084a1f2408c SHA-256: 685ddcd3e66b4eaf78842c9c69999b167922c8ab4b8ff9a28df064545e2137c8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating exploitation. Heuristics confirm the presence of embedded scripts and an embedded file, typical for PDF exploits. The embedded script, though obfuscated, likely attempts to download and execute a second-stage payload, aligning with the 'Exploitation for Client Execution' technique.

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
70db997dcee47509647756de7cde4a131c1729f73bbd840c675c29c9bce1d371		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42836 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.