PDF malware analysis — malicious · 79e313c842f8b559

MALICIOUS

PDF

123.8 KB

MD5: 05853b9b04c1f76577cd0e0115e693d1 SHA-1: ad03558e88315fb5e48d390fa9c649a7dfc1c6db SHA-256: 79e313c842f8b55904d8bc61755963755493c5071239658535075a42b496dc7b

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains XFA form elements and an embedded JavaScript payload. The JavaScript, although obfuscated, appears to be designed to download and execute a secondary stage. ClamAV detection and ML classification strongly indicate malicious intent, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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` `1d07ff8b7900c6a849424e564230f54b4d286314f46583334c49620fa9eaded0`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	126071 bytes

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