Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c7a98c7fb17fb4…

MALICIOUS

PDF

42.4 KB
MD5: 01a31cb93f02c87d1e90b200182df569 SHA-1: 63741012f8ec1a205e72c6e00d50af1075b40692 SHA-256: 09c7a98c7fb17fb4fd86a91af4ad6be6f9330b15ee6af72ee23f58a2230c59f8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded script content and is flagged by multiple heuristics and ClamAV as malicious, specifically as Pdf.Exploit.Agent-36830. The embedded script likely attempts to download and execute a second-stage payload, indicated by the ML_NYX_PDF_MALICIOUS heuristic and the presence of an embedded file artifact. The benign Adobe and XFA URLs do not appear to be directly involved in the malicious execution.

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
e6309cac51c65109a58c58a16672518f3373e1ea0e22678ac420b2acc70e28f7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42689 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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