PDF malware analysis — malicious · 4712b3a2f0cc5648

MALICIOUS

PDF

94.1 KB

MD5: 9c0ccf2b4626c7f0ff58d918bc864e03 SHA-1: 5e596d6f288944437f6369d48a636bb0c769b5d6 SHA-256: 4712b3a2f0cc5648f446eca467d78a8d1b72d29617dcb1ec5e18439091019cdd

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF utilizes XFA forms, a known vector for embedding malicious scripts. Heuristics indicate an embedded script payload and ML classification strongly suggests maliciousness. ClamAV detections further confirm this, identifying it as Pdf.Exploit.Agent. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured by the PDF structure.

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` `ac1dd0d91aca2d72924c3af65b1f3e70c306ef6ace2037efa3c5e13c070adc41`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	95638 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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