PDF malware analysis — malicious · 1f25b3a3d840dfa3

MALICIOUS

PDF

18.3 KB

MD5: e6555a09131adee7eff61203a6c6e1da SHA-1: 2b41f10fcf195853c1e5079b9522e3444dd97401 SHA-256: 1f25b3a3d840dfa3ec5a0a507b0e5f2f1688f43d1bbe3c231bd23e11b5ff2567

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 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 on an extracted artifact. The presence of an XFA form and an embedded script payload indicates an attempt to execute malicious code. The embedded URL, while seemingly benign, is part of the document's structure and may be used in conjunction with the script to download or execute a secondary payload.

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` `757b7584aa45338f30f2a10e824a15302c52d43962a2262184fd425b8da169de`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	17988 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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