PDF malware analysis — malicious · b736be127e52b824

MALICIOUS

PDF

18.3 KB

MD5: 0b5c6298bdf5d3ae495b81789d4815f5 SHA-1: 36a58735b821e4f44b45384ce2372208cd05ca1b SHA-256: b736be127e52b82489bc0c050c6c8deac9b8adb873b0178ab9e10e101b2db0dc

178 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by multiple engines, including ClamAV, which identified it as 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809'. The presence of an embedded script payload within a PDF stream, combined with the XFA form structure, indicates an attempt to exploit vulnerabilities or trick the user into executing malicious code. The embedded URL, while seemingly benign, is part of the document's structure and may be used in conjunction with the script.

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` `3b1bedc1957e346f3ddfd58e369a55d615cba157caa64c3026a8b9f7990e9580`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18004 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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