PDF malware analysis — malicious · b5d1a03bcf3bd604

MALICIOUS

PDF

14.6 KB

MD5: 3a1c65f1fda5bcec48ee994ddee03794 SHA-1: 95bdcf6d0402945f22380921b7bdb6d6616ee4c5 SHA-256: b5d1a03bcf3bd604cca19410c106513d557a2034c63a4fbd000c00bcb6a1c0a0

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. The presence of an embedded script payload and XFA form suggests an attempt to exploit vulnerabilities within PDF viewers. The embedded script likely downloads and executes a second-stage payload, contributing to the overall 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` `8793dff48bd6c1d067265d7c71d498d9e918c3a6b80e5f96dc836f66552b9642`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14205 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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