PDF malware analysis — malicious · 823bfe2c455dec7d

MALICIOUS

PDF

18.4 KB

MD5: 07ca720083e9ecbb78b300e78099388d SHA-1: 31a413f8edaf55835db0c8afb73595dde3cdf604 SHA-256: 823bfe2c455dec7d2303737f5d24311567e216f87407a75a3097c1ce9fdeba7a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains an embedded script payload and triggers XFA form heuristics, indicating it is designed to execute malicious code. ClamAV detections further confirm its malicious nature. The embedded URL is likely part of the exploit chain, though its specific function is not detailed.

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.
Embedded script payload in PDF stream medium 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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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` `aaa591d8e3ee0eab30250442b5d63f91d247e396f74ab63125e1f809e08f964e`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18158 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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