Malicious PDF — malware analysis report

Static analysis result for SHA-256 578cb49a4b3f1c0c…

MALICIOUS

PDF

42.1 KB
MD5: 4ce5096c8d85d3dd1283aecf2e6eec60 SHA-1: b00b79afd743149556021a141d5a05bc855e8ae4 SHA-256: 578cb49a4b3f1c0cf153b319129e940aa712d5a90afc765390a1fe9104e8735c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The PDF file contains embedded script payloads and is detected by ClamAV as Pdf.Exploit.Agent-36830. This indicates the document is designed to exploit a vulnerability within PDF viewers to execute malicious code. The embedded script is obfuscated, preventing a detailed analysis of its specific actions, but the critical heuristic firings strongly suggest an exploit attempt.

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
7f9f7439c6ddf06fab5ce80e610c13614bc03f0ea4798d3e0f759ec7dec06464		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42400 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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