Malicious PDF — malware analysis report

Static analysis result for SHA-256 6106816ff1f12273…

MALICIOUS

PDF

42.9 KB
MD5: 547614f56471a85b796545a1eba2a186 SHA-1: d1ba6968431a3d96084861ff38d6a5fee4312e17 SHA-256: 6106816ff1f12273a8c493d19b7a12f0cfa6642d481bc09c06b0bb14d14b05f0
176 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and ClamAV as malicious, specifically indicating an embedded exploit. The ML classifier also strongly suggests maliciousness. While no document body text was available for content analysis, the presence of embedded script payloads and the 'Pdf.Exploit.Agent-36830' detection point towards an exploitation attempt to execute arbitrary code, likely for downloading further malware.

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
1a4446b0d0355c07ee91d4806eae36605f89e0dff756fdaa3f16613c872aa00f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43136 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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