PDF malware analysis — malicious · a3a5f284b4b24f73

MALICIOUS

PDF

94.1 KB

MD5: baab3528f668eaa3d56406e4d57ce026 SHA-1: 67c2ddf4e5f3fd1e61f6983651f5d1d48b0bd3b2 SHA-256: a3a5f284b4b24f73be906c99d633df6855c80c133bd7efd2aaf827a9b5157d9a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it is a malicious document. The presence of an XFA form and an embedded script payload suggests an exploit is being used to deliver a secondary malicious artifact. The embedded artifact was also detected by ClamAV. The specific exploit and payload are not detailed in the provided evidence, but the overall pattern points to a malicious PDF dropper.

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` `5eaad57f34cf1836f427282b5f50849e7bfc1dbee76abeff7ab3d586b5742506`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	95636 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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