PDF malware analysis — malicious · c92c1fa168a98b49

MALICIOUS

PDF

14.6 KB

MD5: b546aa055e2c6986aebc75f27b01f6e9 SHA-1: a1406e8edf3ccb2b6017c88772042f808739f0ab SHA-256: c92c1fa168a98b49f165c9f781161f93c0b626829cc62c159a02f167218d9cf8

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 heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of an XFA form and an embedded script payload suggests it's designed to exploit vulnerabilities or deliver further malware. The embedded URL, while seemingly benign, is present within the document structure.

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.
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://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` `d502b42a47360e71dc3ab1a2f2805a79caf071ed9d6b10157e04df39fc2f62c2`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14228 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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