Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09eb532da3375f9…

MALICIOUS

PDF

79.1 KB
MD5: aa6df495ceff6aaaac3a142f49398f16 SHA-1: 71cb930790ae7cb7d84ac628dcb6d6b274d19451 SHA-256: e09eb532da3375f95db71ba1587e97a54021830cee92c3fbc6b13a967ae827d7
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The PDF exhibits characteristics of malicious exploitation, including XFA form usage and an embedded script payload. ClamAV detections (Pdf.Exploit.Agent-6136306-0 and Pdf.Exploit.Agent-36769) strongly indicate malicious intent. The ML classifier also flagged the PDF with a very high probability of being malicious. The embedded script is likely responsible for delivering the secondary payload, though its exact function cannot be determined without further analysis.

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_0000023e.bin
6c6ceb1198830be1f973b14ddaf5ef776dbeb2b9d3e39caa29cbf8c6e7cd3a64		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80301 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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