PDF malware analysis — malicious · 8efc78e73ec9cff7

MALICIOUS

PDF

18.3 KB

MD5: cfe65b990b526f6054bb8310e38c8869 SHA-1: ac022f4afad2c86033791ed091abca730474591b SHA-256: 8efc78e73ec9cff7d9cde774f15972262a3f7668d13ad96b94d31646ea4595f7

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains an embedded script payload and is flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The presence of an embedded script suggests it is designed to download and execute a secondary payload, likely exploiting a vulnerability within the PDF reader.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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_00000329.bin` `8ea5e49a942f5c529ade24edbdf5757cc5912acb068da3f822a80de63a5ceabb`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18050 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.