PDF malware analysis — malicious · 753cc0b06dc4a533

MALICIOUS

PDF

18.3 KB

MD5: fd56bc94ab3548c0d698a182cf0d5fd6 SHA-1: 80b7871dd46d8b10db8273affb0f0b1bd4c777de SHA-256: 753cc0b06dc4a5333f447cb5f35c4ffccbf56b0fb7d76fd4bf090d1c6ff7cfe6

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The file is a PDF identified as malicious by multiple engines, including ClamAV, and a machine learning classifier. It contains an embedded script payload and utilizes XFA forms, common techniques for delivering exploits. The embedded URL, while not directly malicious, is part of the PDF's structure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
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_00000325.bin` `13607e3725f8cd3227f7ee8b35adef48cc4e5f5a8bdb8130749e5ed2a5e4fa31`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	17997 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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