Malicious PDF — malware analysis report

Static analysis result for SHA-256 722b414a5f2d1149…

MALICIOUS

PDF

41.9 KB
MD5: c80a45edfa687ae5422017a3cbcb85c1 SHA-1: 7d749648fcdaaa95cd1ac31834b7bcd7dce99d3a SHA-256: 722b414a5f2d1149c809786de57ca50b7eb75730ca6e8ff785b77773c1a5b20c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains embedded script content and is flagged as an XFA form, indicating it likely exploits a vulnerability within the PDF rendering engine to achieve code execution. No specific IOCs were extracted beyond the benign Adobe and XFA URLs.

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
ee12ea52b3d5b158edddd12fa18def0c9a6fcc40817b80ceb34e2f032c3d5ff5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42140 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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