Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bc36a89b8b0206…

MALICIOUS

PDF

42.9 KB
MD5: 7f4a6b564b615d18f9400df868390cdf SHA-1: 7a4bc148921d683fe6d3bd8e516f070ab042847f SHA-256: 23bc36a89b8b0206a16237d3b5612ed84a734fd905835dab84118bd7e2126e3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF file contains embedded content and a script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detections confirm this is a malicious PDF exploit, specifically 'Pdf.Exploit.Agent-36830'. The embedded script is heavily obfuscated, making its exact function difficult to determine, but it is likely responsible for executing the exploit and delivering a secondary payload. The document body content is not human-readable and appears to be obfuscated script or data.

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
87a8308507a0a8180046e018de6fb088929625e1545ff28d40aa9461a4fc4e0b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43141 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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