PDF malware analysis — malicious · 0e379efa889f3cbf

MALICIOUS

PDF

18.3 KB

MD5: b73dec8ec6a7dc4e7dc38b77906e7081 SHA-1: 9ddc0df9f4eb6b2a5be936aac170760652fece4d SHA-256: 0e379efa889f3cbfceba1247e5c5667db194b4d6538f02a3ee5fcd3eff7695ee

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as malicious by multiple heuristics, including ML classification and ClamAV, indicating it's a PDF exploit. The presence of an XFA form and embedded JavaScript strongly suggests it's designed to execute malicious code. The embedded script likely attempts to download and execute a second-stage payload, a common technique for initial compromise.

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` `e87d8f7f04e03ea0a5d567a0e10166f882f45c4cd80e9dd4439572ab5ab2c9b5`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18039 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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