Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d2c11d723a589e…

MALICIOUS

PDF

43.0 KB
MD5: 352594cb1ec0ea4b84c8fd0991990b5c SHA-1: aa0007f65416521ba884cb0f9cf63db0ee3b0ebe SHA-256: 21d2c11d723a589e9f99063c37a104bcf2236c47c556d9ded6c43fa1343b030c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of an embedded script payload and an embedded file suggests the PDF is a dropper or exploit document. The embedded script, though obfuscated, appears to be JavaScript that attempts to construct and execute commands, likely to download and run a second-stage payload. The specific URLs found are related to XFA forms, which are known to be targeted by PDF exploits.

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
0bfd9c2e0af0620547ee616c0b6f575759fceb09b7f4ec3ed007454fcbbc3221		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43281 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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