PDF malware analysis — malicious · f6498344570de0a4

MALICIOUS

PDF

18.3 KB

MD5: e9f554441c909d21c11ab0a88b2faeec SHA-1: 6fba3663f0a023cfeb2663fa670de55c25561c5c SHA-256: f6498344570de0a4d9f34609d498f18e2b31408caa09d86b78498dcb9aab3e4c

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an embedded script payload and was flagged by multiple detection engines, including ClamAV, as a malicious exploit. The ML classifier also strongly indicated maliciousness. The embedded script is likely responsible for downloading and executing a secondary payload, as suggested by the 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809' ClamAV detections. The presence of an XFA form is a common characteristic of exploit-laden PDFs.

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` `8d3d9bffe057a4424a05061f17f20c982151c8db273e0f0b4adbc32ab8f81c1f`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	17991 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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