Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67c2bae93b36b21…

MALICIOUS

PDF

32.6 KB
MD5: d41d335b36f0b8d11f7d69aa34820a03 SHA-1: 126bf616a2f7dde6da712b8be5105ae516364e8e SHA-256: f67c2bae93b36b219e54e21f83b6a3c70111a3b3ba030bec8ff75c87c6021c9f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for 'Pdf.Malware.Agent-10043169-0'. It contains an embedded script payload, indicating it's designed to execute malicious code upon opening. The presence of XFA forms and embedded files further supports its role as a delivery mechanism for malware. The exact nature of the payload is not fully discernible from the provided script excerpt, but the overall pattern suggests a downloader or exploit loader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 5

  • ClamAV: Pdf.Malware.Agent-10043169-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-10043169-0
  • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_000002da.bin
f3a9ebc9b0fc7fa8cac0660c68340ab409a5240078c7214f8da5d5b560357b42
pdf-embedded-script PDF decompressed stream script payload at offset 0x2DA 29154 bytes