Malicious PDF — malware analysis report

Static analysis result for SHA-256 67109eb066ae2f81…

MALICIOUS

PDF

42.3 KB
MD5: 704febb893509694a4f72140f030817e SHA-1: c68c4d6584273d38a6f625f125edf6125d83065c SHA-256: 67109eb066ae2f81464090e70f09238f8674b18f9a4747208ecb73d7991b88b0
176 Risk Score

Malware Insights

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

The PDF document contains embedded script and is flagged by multiple heuristics and ClamAV as malicious, specifically 'Pdf.Exploit.Agent-36830'. The embedded script likely serves as a payload, potentially leading to further exploitation or execution of malicious code. The presence of an embedded file further supports the delivery of a secondary artifact.

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
4e5e592494715a8b928a18fa6e0b2dcfd4b4e4011bd146d4a4066ab6f7cfa7ba		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42534 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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