PDF malware analysis — malicious · 23812b98bfc88035

MALICIOUS

PDF

42.4 KB

MD5: d07a574a6eb33357400a0b4664501b9f SHA-1: 5a62714b5b4551b28e9c15c7935ecb99d909dea2 SHA-256: 23812b98bfc88035b6cf0a4b7a20b2f052ea5b2afb4ff6bd3cbd3f83660c4d59

186 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file was flagged as malicious by multiple engines, including ClamAV, which identified it as Pdf.Exploit.Agent-36830. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and deliver a secondary malicious artifact. The ML classifier also strongly indicated maliciousness.

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` `a12d0e1828eea5f248d1e384ac060715477040aef67d713edfcab76a293b06d2`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	42656 bytes
Detection ClamAV: Pdf.Exploit.Agent-36830 Obfuscation or payload: unlikely

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