PDF malware analysis — malicious · 622bdcf34170c599

MALICIOUS

PDF

79.4 KB

MD5: fb25121758858bcb040d593ade937b46 SHA-1: 362c141e61fd4f16967a64acfd5f7c76875ad857 SHA-256: 622bdcf34170c59939f2dfa0784682273a5749171517fd6dfd495adc4a4c4cd9

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and a machine learning classifier, with heuristics indicating an XFA form and an embedded script payload. The embedded JavaScript, though obfuscated, appears to be designed to download and execute a secondary payload. The specific nature of the exploit and the lack of clear indicators for a known family lead to an 'unknown family' classification.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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/
- 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_pdf_script_0000023c.bin` `c45cd273bd2e1789a42f4e484dc2955482e83de61911021e7ba0615973cda4c6`	pdf-embedded-script	PDF raw stream script payload at offset 0x23C	80624 bytes

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