PDF malware analysis — malicious · 39c94cfa7461c282

MALICIOUS

PDF

42.6 KB

MD5: 480cfc97b2c06a37d1f2a00e6dc2f286 SHA-1: 4d331d815a136a14141b29a26659c25031124cc7 SHA-256: 39c94cfa7461c28207cb399616d2779cd02cf8617f822055fc19094629bcb73d

156 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded content and an embedded script payload, as indicated by multiple heuristic firings including critical ClamAV detections. The embedded script is heavily obfuscated, making its exact function difficult to determine, but it is likely responsible for downloading and executing a second-stage payload. The presence of XFA forms and embedded files further supports its malicious nature.

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` `de269038abeb19d2d64880028350f6926d3ea97ec0b118971ded866c7181ddcf`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	42920 bytes
Detection ClamAV: Pdf.Exploit.Agent-36830 Obfuscation or payload: unlikely

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