Malicious PDF — malware analysis report

Static analysis result for SHA-256 632f9978ed8b7ecb…

MALICIOUS

PDF

42.4 KB
MD5: 0f5a1255d15c52c1feff526866502330 SHA-1: e430235204ecd1bee00f0d4085f53fe05b324342 SHA-256: 632f9978ed8b7ecbb4cf8c99880336ea12202dae0843a62e4e7d11f97495724c
176 Risk Score

Malware Insights

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

The PDF file contains embedded scripts and utilizes XFA forms, which are common vectors for exploiting client-side vulnerabilities. ClamAV detection as 'Pdf.Exploit.Agent-36830' strongly indicates malicious intent, likely involving the execution of an exploit. The embedded script, though partially obfuscated, suggests an attempt to download and execute a secondary 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 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
87c9c0f8f25af19ab04339c5fc52da17435bd907962f90c428663340287c3b65		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42634 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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