PDF malware analysis — malicious · 138145b362c1bb44

MALICIOUS

PDF

79.4 KB

MD5: 98dfe3ea850ec2568ffd3483eca952f9 SHA-1: 40eb805a66055727721396fb0814a8cded06fa72 SHA-256: 138145b362c1bb44ffa1a6f4a7e59d83fb402bf873d5e74acc874fe3de65fb9b

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 an ML classifier, with heuristics indicating an XFA form and an embedded script payload. The embedded JavaScript, though obfuscated, appears to be designed to execute code, likely for downloading additional malware. The benign URLs present do not detract from the malicious nature indicated by the other findings.

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` `0753cd3be89d2ff41f39a63fded91aab04a3b02ea86cc2a48d803a83f5dcca74`	pdf-embedded-script	PDF raw stream script payload at offset 0x23C	80624 bytes

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