MALICIOUS
168
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. The presence of an XFA form and embedded JavaScript points to an exploit targeting PDF viewers. The embedded script likely attempts to download and execute a second-stage payload, as suggested by the exploit detection.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36789
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ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAVClamAV 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.
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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
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Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOADPDF 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.
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Embedded URL info EMBEDDED_URLOne 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://www.xfa.org/schema/xfa-template/2.5/
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_pdf_script_00000325.binf4d4bd858be8ef4e953ebe58afc5e7fb54f7fa84b97b95675453e565527c62e7 |
pdf-embedded-script | PDF raw stream script payload at offset 0x325 | 18040 bytes |
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Detection
ClamAV:
Pdf.Exploit.Agent-36809
Obfuscation or payload:
unlikely
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