Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c6929572943636…

MALICIOUS

PDF

42.9 KB
MD5: 093976aab86b8fd013e8113c21125078 SHA-1: 47677775fd4d3f79e8f89d5d6d92dc74faf99056 SHA-256: 22c69295729436363a5d20f76e90e2e102b5d131658a972dbe4e4fe97b1af23c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains embedded content and a script payload, flagged by multiple high-severity heuristics and ClamAV detection as Pdf.Exploit.Agent-36830. The ML classifier also strongly indicated maliciousness. The embedded file and ClamAV detection are the primary IOCs. The presence of XFA forms and embedded scripts suggests an exploit attempt to download and execute a second-stage payload.

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
c866c8eff12168104cd522df3133763f61385529cecbc025e2cddfad66ba6e82		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43163 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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