PDF malware analysis — malicious · ba28b6426b60f54b

MALICIOUS

PDF

93.5 KB

MD5: c070891d050321da18927d564267dbea SHA-1: 3d98e153c2fecc5455153c7cc8200f30ffe55a0b SHA-256: ba28b6426b60f54b3b8baa74a37bd9aa6f7f4cb467fdd53a3b5d2f6d16eb9d3a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The PDF was flagged by multiple high-severity heuristics, including ML classification and ClamAV detection, indicating it contains malicious content. The presence of an XFA form and an embedded script payload suggests an exploit is being leveraged. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact functionality 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` `77b79ab874677c72eaaf9306ed5a96a43aa259dab2ac424774d223022301e11b`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	94992 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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