PDF malware analysis — malicious · 741e9f25caa83661

MALICIOUS

PDF

4.0 KB

MD5: 963e65a59fd40041f6ed3c9a6ef85ae0 SHA-1: a6c484196afba3a2296dfbfdc0356a5eee8bb2ce SHA-256: 741e9f25caa836612805b1093305fc9025e21a6feb0f1035b47a96ddee51f423

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains XFA form elements and an embedded JavaScript payload. The JavaScript attempts to deobfuscate and likely execute a malicious payload. The ClamAV detection 'Pdf.Exploit.Agent-6136306-0' and the ML classifier output strongly indicate malicious intent. The embedded script's obfuscated nature and its attempt to deobfuscate a string suggest it's designed to download and run a secondary payload, characteristic of a downloader or dropper malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9966

Heuristics 6

ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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 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 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://ns.adobe.com/xdp/
- 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_00000264.bin` `4dc19acd83bdfb3c06f72c6f2270656592d91f59593c64bbdfb6dd92edffc9b8`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x264	4094 bytes
Detection ClamAV: Pdf.Exploit.Agent-6136306-0 Obfuscation or payload: unlikely

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