PDF malware analysis — malicious · 7608e8e355325c13

MALICIOUS

PDF

14.8 KB

MD5: b92a150677bbbbe48abff36b9ef233f2 SHA-1: e5aff2d9cccb4db4d8a5ea7ed804fb159f4bf123 SHA-256: 7608e8e355325c1388e62ded0a3084e25ac2bf3398a588fa9ee5ab0f9f0284cc

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and an ML classifier. It contains an embedded JavaScript payload within an XFA form, which is a common technique for exploiting PDF vulnerabilities. The embedded script is likely responsible for downloading and executing a second-stage payload, as indicated by the ClamAV detection on an extracted artifact (Pdf.Exploit.Agent-36809).

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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low 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.
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` `b99e02df6e54bfc4c9982758272f1ecc7f4dbdb00f5416e00e0d9e11c44937eb`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14433 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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