Malicious PDF — malware analysis report

Static analysis result for SHA-256 527054eeb9596956…

MALICIOUS

PDF

42.9 KB
MD5: 8c6dfb61288903c61e4fdf1f096ec922 SHA-1: ee6c26c9ee07d75c10b5134fab301a4c55af65c9 SHA-256: 527054eeb95969561267ce434f184f7c1762511eb31ba900b5dca8dac8762fc5
156 Risk Score

Malware Insights

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

The PDF file contains embedded script content and is flagged by ClamAV as Pdf.Exploit.Agent-36830. The embedded script, although obfuscated, appears to be JavaScript that is likely intended to download and execute a second-stage payload. The presence of XFA form elements and embedded files further supports the exploitation of PDF vulnerabilities.

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
d3d64a06c4b0a77fa3d36527685d75909ca4cc3cfd2ba490498fc50fad8167e9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43214 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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