PDF malware analysis — malicious · 56eca634145f3b7b

MALICIOUS

PDF

14.7 KB

MD5: ba390988669bb4feec983a93638e3e99 SHA-1: 310a43d4c2422d2fe8ea1d71e6bb4534b33f74fe SHA-256: 56eca634145f3b7bb4dbb9f35358818a552eaf79dd035ddf747558043dc3f895

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains an embedded script payload, as indicated by multiple high and critical heuristic firings including ML classification and ClamAV detections. The embedded script is likely responsible for downloading and executing a second-stage payload. The presence of an embedded URL further supports the malicious nature of the document.

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` `f44a4668be1ac917ee66d4f12bda8941bcb850f825f518eabd8a3143dec1ab7b`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14305 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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