Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c929676da15929…

MALICIOUS

PDF

42.4 KB
MD5: a8f901ff20288612b9206d36c35af7fb SHA-1: 99f50b9806e5eb14b4fe8bbafe81cdd6cfe075aa SHA-256: 91c929676da159295b0a6a9250587ef98a297d3499bae6abdf396c2c4a9f227a
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection, as malicious. The presence of an embedded script payload and an embedded file strongly suggests it's designed to exploit a vulnerability and deliver a secondary payload. The ClamAV detection name 'Pdf.Exploit.Agent-36830' is included as a primary IOC.

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
b56f7d5ca42de55ba6b48bce113b35f8439e11a601173826115c64f165a9fddf		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42677 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.