PDF malware analysis — malicious · 74566b949b46cf58

MALICIOUS

PDF

12.8 KB

MD5: 78b7959125b9dda956a88aa2b4767213 SHA-1: 314e41bc99fb9548efbfd25daa49f3cdc39a4980 SHA-256: 74566b949b46cf588f885664d2105797d9ec5ac6f76af6f18cc2ab95fe81e63a

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 embedded JavaScript within an XFA form strongly suggests the script is intended to execute malicious code. The script's content, though partially truncated, appears to be constructing a complex string, likely for obfuscation or to form a URL or command for a second-stage download and execution.

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://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_00000359.bin` `9977183e2ca2421d9871beac3c4d92e035463a4550119fed45fb1ce7cd7956f3`	pdf-embedded-script	PDF raw stream script payload at offset 0x359	12362 bytes

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