PDF malware analysis — malicious · 435899b2879d09ee

MALICIOUS

PDF

42.5 KB

MD5: 847fef69e5373fdd2200aba6cc85f68a SHA-1: cb6caf94649894a40c45a717f5338328c49ab7b7 SHA-256: 435899b2879d09eed5682e1f853493f9c0200ac51f70d597e1bce61cf4dc0b4c

156 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV heuristic firings, specifically 'Pdf.Exploit.Agent-36830', indicate the presence of a known PDF exploit. The embedded file and script payload heuristics further support this, suggesting the PDF is designed to execute malicious code. The embedded script, while obfuscated, appears to be involved in the payload delivery mechanism.

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` `969897f40c038695655b298cba7b30104038d0e90551ff42ca558ba9758eacef`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	42718 bytes
Detection ClamAV: Pdf.Exploit.Agent-36830 Obfuscation or payload: unlikely

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