Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90ec9caf95f6382…

MALICIOUS

PDF

42.4 KB
MD5: 90602f4802605c65a7acab63cbace621 SHA-1: 9b4345ebe45aa85949eca1fbc529ece05bb3f778 SHA-256: f90ec9caf95f63828cce9fb7ece20608401fbf3dcd252be11f28685197873483
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' indicates this PDF file contains an exploit. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic confirms the presence of an embedded script, likely responsible for delivering the malicious payload. While the document body contains JavaScript-like syntax, it is heavily obfuscated and does not reveal a clear user-facing lure. The embedded artifact 'embedded_file_obj0008.bin' is the likely payload.

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
acd728992e309e7252471288bf2b5ad5f945112a41a20f199a7b36bb9890f8b1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42660 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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