Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc1e8295b7645a3…

MALICIOUS

PDF

42.7 KB
MD5: 769adf19c5f78bd9fec1a9d0f54c4763 SHA-1: 65aa4d18b96ac7c5fe91ab2080afcd73a2d31171 SHA-256: 6cc1e8295b7645a31e2b435a8e48e4cb7ca64b2a2e4f622ba501946982831d30
176 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically as Pdf.Exploit.Agent-36830. It contains embedded scripts and an embedded file, indicating an attempt to exploit vulnerabilities for client execution. The presence of XFA forms and embedded scripts suggests a complex exploit chain, likely delivered via spearphishing.

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
d5f018c0f379aabdde8db93b4cfa5eb5e0c512ca2f70e91afc573e0055ae5518		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42994 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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