Malicious PDF — malware analysis report

Static analysis result for SHA-256 2738061cf94ad38d…

MALICIOUS

PDF

42.7 KB
MD5: 5281094ddba949c2f856bc6ddd1117f7 SHA-1: bccda59162430e1a9ba562fa920856bb347f624a SHA-256: 2738061cf94ad38d4442ee32a183e3ef34a80a2c4179778ebcaba87a520ea37b
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings, specifically 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact, strongly indicate a known PDF exploit. The presence of an embedded script payload further supports this, suggesting the PDF is designed to execute malicious code upon opening. The embedded URLs are benign or unknown and do not contribute to the maliciousness.

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
df8778a8d281b207c0aa502726b97bcdd34b27ec64ae129cd3fc8649e4d289bd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42940 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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