PDF malware analysis — malicious · 34811f53320a80f1

MALICIOUS

PDF

14.6 KB

MD5: d8a5896c150ee3ebc4659a1155c03c03 SHA-1: 2b1e5bc29c571202c257bbd5ad7bc4dc8f7b0a4e SHA-256: 34811f53320a80f1c154be925f3f6db77940975c13f97d758271f32ff4c1413b

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded script payload, flagged by heuristics and a machine learning classifier. ClamAV detections indicate it's a known exploit or dropper. The embedded URL is likely part of the malicious delivery chain, though its reputation is unknown. The presence of XFA form elements and embedded scripts suggests an attempt to execute malicious code upon opening.

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` `5bf886ca05d6095bca73d5e9f4db308a568ee53a3ccaeca67030593f9921eb4c`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14239 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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