Malicious PDF — malware analysis report

Static analysis result for SHA-256 54be4fbf7f3a50b7…

MALICIOUS

PDF

100.5 KB
MD5: 314c4c93e4ed755778a63764dc7f82dc SHA-1: 8ef040180868abe8cbf3393df60fb6b2facf1493 SHA-256: 54be4fbf7f3a50b7cb7b200edada192206dffc795487ab9bffb1f87b93399d44
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV, indicating it contains an exploit. The presence of an XFA form and an embedded script payload suggests the PDF is designed to execute malicious code. The embedded script is likely responsible for downloading and executing a second-stage payload, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
185d0a54633b4b94be797c1e4c7d0da798375bdcb9a3003128821e8cdd462fa5		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102156 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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