Malicious PDF — malware analysis report

Static analysis result for SHA-256 64aed5f923422d30…

MALICIOUS

PDF

42.6 KB
MD5: 658cb3652bc509ee3b757605b94b3b0d SHA-1: 97ef2e92456db9c1441a88b49bc253b6e33ebace SHA-256: 64aed5f923422d30c4ff70fb095c6c0dd84f3db901870327d9996467b0b913ba
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is identified as malicious by multiple high-severity heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36830', and an ML classifier. The presence of embedded scripts and an embedded file within the PDF stream strongly suggests an exploit is being leveraged to execute arbitrary code on the victim's machine.

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
a139548a8928d85b2700c712bc452c4c295d12c63029fbd0f6418f748906ad1f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42861 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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