PDF malware analysis — malicious · 21a8e843b05fe6cd

MALICIOUS

PDF

93.4 KB

MD5: b7bec867f1f2fee6da2859c515a9e1b9 SHA-1: 2b95b1cbb0af977241c7853ec6161fb323179e5f SHA-256: 21a8e843b05fe6cda18f611d475374f3970ecfd5b99293b1f89ae2ec6b19b1dd

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detections, indicating it contains an exploit. The presence of an XFA form and an embedded script payload further supports this. The embedded artifact 'embedded_pdf_script_00000246.bin' is likely the malicious payload, though its specific function cannot be determined from the provided evidence.

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.

Filename	Kind	Source	Size
`embedded_pdf_script_00000246.bin` `829e5b9aa418dfe55f2982ba7bca4019e27dc79a8709dc78add1f18858361093`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	94924 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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