Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a27457dc4ab485…

MALICIOUS

PDF

42.4 KB
MD5: 46091366da32c4f91f52b4ee825bd70a SHA-1: 4a9e8118adfec742f3008cede439060db9ff7eeb SHA-256: 01a27457dc4ab4859ca5bc6daf825c4c087d7d8b5d4d05c23447fc94b08782e5
188 Risk Score

Malware Insights

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

The PDF file contains embedded script content and is flagged by multiple heuristics, including ML and ClamAV, as malicious. The embedded script, although obfuscated, likely serves to download and execute a second-stage payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_CLAMAV' firings. The primary detection signature is 'Pdf.Exploit.Agent-36830'.

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 script payload in PDF stream medium 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 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 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
d99b49ca432458790aa5fe213ea8b17a39ad6c7c651d1bfd4ca2d8c6d2ac41f4		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42684 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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