PDF malware analysis — malicious · 82a71f0ced46a5cf

MALICIOUS

PDF

79.3 KB

MD5: 4323db4e32f9836b36f00533f8dd5a98 SHA-1: baa44a606fca30d418411284e0badc63f00129bd SHA-256: 82a71f0ced46a5cf3580c7d560d6c16a6fadc79e0a5efb2b957833951c4c85b6

108 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating it contains an exploit. The presence of an embedded JavaScript payload within an XFA form strongly suggests the script is designed to execute malicious code, likely downloading a second-stage payload. The benign URLs found do not detract from the malicious nature indicated by the exploit and embedded script.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0000023c.bin` `062d5b8d379ce5afa75a3bed42682834142d4428363eeee3b1d878556fca6d7a`	pdf-embedded-script	PDF raw stream script payload at offset 0x23C	80534 bytes

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