PDF malware analysis — malicious · 8396ac00832c6b2a

MALICIOUS

PDF

18.3 KB

MD5: ccb63c7d5248ea8752f3c79616840aea SHA-1: 118630b6e45675d1d1b95e153433686a8d35ec90 SHA-256: 8396ac00832c6b2a72f66bfb0cb986d621a462c6149579a763e018d6ad904b41

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded XFA form with JavaScript, flagged by multiple heuristics as malicious. The embedded script, although obfuscated, likely attempts to download and execute a second-stage payload. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent. The embedded URL is likely related to the exploit or payload delivery.

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` `54db4ccf01f4f397dd541c112288d0d4296771fd40712f219a20438995eca4d3`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18030 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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