Malicious PDF — malware analysis report

Static analysis result for SHA-256 1941fe4de3d26e6c…

MALICIOUS

PDF

94.1 KB
MD5: 83de24e156db58b31d7d87642559a726 SHA-1: 78e76d6c90ab4489dc11833baefe8a671008741b SHA-256: 1941fe4de3d26e6cdf161baf4d51c8b7bcf3533ac37a375b94469e12317f8f8e
168 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript within an XFA form, flagged by multiple heuristics as malicious and specifically detected by ClamAV as 'Pdf.Exploit.Agent-6136306-0'. The embedded script is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The benign URLs present are likely decoys or part of the XFA template structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
1438a6cd979a66d80dbe3157ecc118a4d167a709e2bbed9cbb4488f79da9d309		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95638 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.