PDF malware analysis — malicious · c3573c3f4828c96f

MALICIOUS

PDF

46.4 KB

MD5: b743d8d958af453cd5d2e7a77cc9222f SHA-1: e21328522aa83353c9631a642e02e3320dffdc2c SHA-256: c3573c3f4828c96fc2bbdd4953c128931b5db3542f65f7920223068d0d341448

186 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution - Malicious File

The PDF exhibits multiple indicators of maliciousness, including embedded script payloads and a high ML classifier score. ClamAV detection as 'Pdf.Exploit.Agent-36830' strongly suggests it's an exploit-based document. The embedded script payload, though not fully detailed, is a common mechanism for delivering secondary malware. The presence of XFA forms and embedded files further supports its role as a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `38943ab605cbc820126b65e2d942dd94143cf8e67a7d8fd48c6b1e53bc7701c6`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	46753 bytes
Detection ClamAV: Pdf.Exploit.Agent-36830 Obfuscation or payload: unlikely

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