PDF malware analysis — malicious · 75b78039b8cd59ed

MALICIOUS

PDF

14.6 KB

MD5: 6850830a88a7e5fce6bc0417aac7ebe9 SHA-1: 047fbc372477c8cd25cb24d31a159957c4d7dcb7 SHA-256: 75b78039b8cd59ed3db1a57e62f78f78ef6a6fa29d63dc08ad7102ba4e9fbc80

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF containing an XFA form and an embedded JavaScript payload. Heuristics and ClamAV detections indicate it is an exploit designed to drop a second-stage malicious artifact. The embedded script, although truncated, appears to be JavaScript, suggesting it is used to facilitate the exploitation and download of the payload.

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` `55579bd95ad6221ea6d819ad1a82dd52de44c1fe7c40762457623feced95e85a`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14232 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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