Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae4d3979fb56f92…

MALICIOUS

PDF

42.4 KB
MD5: e62fc573ea338c0f6436658b109c4dbd SHA-1: d4aa080087efc031b8b68f7bad5d211a23dcf1f2 SHA-256: aae4d3979fb56f921e7a6eea5017aa51ee8a9b581d575aeae9f8be4b28362677
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The PDF contains embedded content and scripts, typical for exploit delivery. While the document body is heavily obfuscated and unreadable, the presence of embedded artifacts and script payloads suggests the PDF is designed to exploit a vulnerability, likely to download and execute a secondary payload. The embedded URLs are not directly indicative of malicious activity but are part of the PDF structure.

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
dfe3fe3ad655332e89c87ad6b3cbf6068de34ae55a83bda38d023b4def774081		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42714 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.