Malicious PDF — malware analysis report

Static analysis result for SHA-256 095338e81b7ef33e…

MALICIOUS

PDF

42.5 KB
MD5: ea9a6c5667c4f5ce17c3df506bd6d530 SHA-1: 255a0b614944a3099490cdacba400fef0f6f923a SHA-256: 095338e81b7ef33efe13777f16d72c3c70a0173eb0e58b55f5225dd509ae42cb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains an exploit. The presence of embedded script and XFA form suggests the exploit targets PDF rendering or JavaScript execution within the document. The embedded artifact, named 'embedded_file_obj0008.bin', is also flagged by ClamAV, further confirming malicious intent.

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
5adc31f0d40ed1c2ed1c0355cae3dbac2951754d111cd875e5ab2485840f1e1f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42729 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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