Malicious PDF — malware analysis report

Static analysis result for SHA-256 25764af43d17a9c7…

MALICIOUS

PDF

42.9 KB
MD5: 67968b34fc5b98934ac85efa9eb939d9 SHA-1: 085410efa7911829b63f4974c4c94b7fcc8c6d17 SHA-256: 25764af43d17a9c7b2994beec2760cedb232014bdf377b26cce7c72c1ea4696b
156 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830. It contains an embedded script payload and an embedded file, indicating an attempt to exploit vulnerabilities within the PDF reader to execute malicious code. The embedded script is heavily obfuscated, making its exact function difficult to determine, but the overall pattern suggests a downloader or exploit delivery mechanism.

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
bebe9d82b28787016791c61178e49403a8f31e83cb6c18f7d738a60c16a8dfd9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43138 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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