PDF malware analysis — malicious · 20ec3dbc57098b52

MALICIOUS

PDF

18.3 KB

MD5: a67b74ed18b174e42ad1bbcba0f62a99 SHA-1: 67a33d3cff0b163a60ccad6e63c3d64320b3bccf SHA-256: 20ec3dbc57098b52d9d4871bd81a8c6bd4d8ca436bdde716d8e48300a204e0a3

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload and utilizes XFA forms, both flagged as malicious by heuristics and ClamAV. The ML classifier also strongly indicated maliciousness. The embedded script is likely responsible for downloading and executing a second-stage payload, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. The embedded URL is likely part of this delivery mechanism.

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` `c12271f7510a9ec16509805c6eddccc164e4c81e25adb169921f371e69d007d6`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	17976 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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