PDF malware analysis — malicious · 674b7bd5ab5fd3ad

MALICIOUS

PDF

14.6 KB

MD5: 7addfb097bce8782998a1e0496dec790 SHA-1: e250ca15581e5ebb5f0803b70590566727b2158a SHA-256: 674b7bd5ab5fd3ad16d322b5090115f913fcbc1a42e6a46b2db8e16b99a08088

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document contains an embedded XFA form and script payload, flagged by multiple heuristics and ClamAV as malicious. The embedded script, written in JavaScript, is likely responsible for downloading and executing a secondary payload, as indicated by the 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809' detections. The script's complexity and obfuscation suggest a deliberate attempt to conceal its malicious actions.

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` `04d196789aa373de135b4421756d18cd2e5875dab62366aae4f2d93735f18570`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14220 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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