PDF malware analysis — malicious · 0c86de95ab1ad7c0

MALICIOUS

PDF

18.3 KB

MD5: 98cb77a2d4b40a55d97dc5f390547ee0 SHA-1: 7fc27bd951cf0309f431a5c927099a3613780235 SHA-256: 0c86de95ab1ad7c0a0235e8dff4b885e95c52903e17f9ec8318b368d71445035

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF was flagged as malicious by multiple engines, including ClamAV, and exhibits characteristics of XFA form exploitation. An embedded script, identified as JavaScript, is present and likely responsible for executing the malicious payload. The script's content is heavily obfuscated and truncated, preventing a precise analysis of its actions, but its presence strongly suggests it's a downloader or exploit launcher.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low 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.
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://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_00000329.bin` `d9171c2edff95b9564ed73231d3b405fbf526f1fa28ffe9e472d39e25e23b0bf`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18043 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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