Malicious PDF — malware analysis report

Static analysis result for SHA-256 4362dcf2e8f82d06…

MALICIOUS

PDF

42.4 KB
MD5: d538b3eef72ecb5bc3130a96fcfbe30f SHA-1: 35b356406c27e0a7fa1801d5846342317626c4cd SHA-256: 4362dcf2e8f82d06a1f01175186db95477cf55cab26a73c2a7c48962f900c271
186 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Exploit.Agent-36830, indicating it contains an exploit. ML classification strongly supports this, with a score of 0.999995. An embedded script payload was also detected, suggesting the PDF is designed to execute malicious code upon opening. The exact nature of the script's execution is unclear due to obfuscation, but the overall pattern points to a malicious PDF exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
cad93cc4fc3e3ae65d9bd7d789d80d74a18e39cdc03be3dc444db4f0cdf7f578		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42679 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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