PDF malware analysis — malicious · 5139a6e141b86a20

MALICIOUS

PDF

14.6 KB

MD5: 285f5b0adf1f2a7458ff5ba1c838f4c5 SHA-1: eac7c7a78df6e2cf54709a0ea4b59586a80d255e SHA-256: 5139a6e141b86a20556a091b3f9ead6f57f9774ffb4799d012f9773b35b9bae5

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains an embedded script payload and is flagged by multiple detection engines, including ClamAV, as a malicious exploit. The ML classifier also strongly indicates maliciousness. The embedded script is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Exploit.Dropped' and 'Pdf.Exploit.Agent' detections.

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` `75d92ec938f8892cd7064cea596d1c073caaf8d92dc8999204f5ef66d7915e1f`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14251 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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