PDF malware analysis — malicious · 01fe54b466613571

MALICIOUS

PDF

18.4 KB

MD5: c2d229b9ea4cbe23a298fa4cbeb3c9a8 SHA-1: 544402552ca99f3c624b670219103a482e81a79c SHA-256: 01fe54b46661357164bfbfa978f7f0b7d2942e65ed40f7dca30ef33ba0cde8be

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The presence of an XFA form and embedded JavaScript strongly suggests exploitation for client execution. The embedded script likely downloads and executes a second-stage payload, as indicated by the ClamAV detection on an extracted artifact.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
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_00000325.bin` `9435c90de2742d081179a4d3b4038bbab982fca2d160717762828106c9a76300`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18079 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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