PDF malware analysis — malicious · 09fde9e3443f8fb6

MALICIOUS

PDF

18.3 KB

MD5: 773844dbdeb5a8516f23652dceeb17cb SHA-1: 563aa012fecdbd378e04b235ee031c21cf30b56b SHA-256: 09fde9e3443f8fb63a76edf23c89d6b2e3a071a1fd1e32bf7e330878fe679f52

168 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains XFA form elements and an embedded JavaScript payload, strongly indicating an exploit attempt. ClamAV detections further confirm its malicious nature. The embedded script likely attempts to download and execute a second-stage payload, leveraging the embedded URL for this purpose.

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` `e62fee94064cb2a4726021202a7809f7b59c74bcc0908cab4206910323a8b416`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18028 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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