Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b05559127be51f…

MALICIOUS

PDF

46.6 KB
MD5: 53d150f7daf39b2549147eb66489aee9 SHA-1: 6e4aa6ac3c92b0c4e365af04f491aba4eeb0981f SHA-256: 67b05559127be51f6764e2cff27f6cd75d9ec052b749814628b04d9bb9c1f644
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36830', indicating it exploits a known vulnerability. An embedded script payload was also identified, suggesting the PDF is designed to execute arbitrary code upon opening. The benign URLs present are likely decoys or standard PDF form-related references.

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 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 script payload in PDF stream low 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 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
87236253a8ac96c75b22e06c6c79e771158942d34d9afbfe1dc3c1fc1b7ed458		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46943 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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