Malicious PDF — malware analysis report

Static analysis result for SHA-256 a487d9e435f84dca…

MALICIOUS

PDF

42.4 KB
MD5: 583177c92670a9bacf6e311bd77dfc68 SHA-1: c754d3e336ffebca484a8f8dbd5cf1a2cd6bf55e SHA-256: a487d9e435f84dca266f22978dc1ffd8dac99112e1712c4d8dea275c6b4fc6a8
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings, including 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact, strongly indicate a malicious PDF exploit. The presence of an embedded script payload further supports this, suggesting the PDF is designed to download and execute a second-stage payload. The document body content is not human-readable and appears to be obfuscated script or data.

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
d8d421a96d6165101c23097bd6fcce6f43c6183d34afff4d585610a3be961e6b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42613 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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