PDF malware analysis — malicious · 0ec728087e7ff86a

MALICIOUS

PDF

43.2 KB

MD5: 5f2668eedecf2223716fe0ac45b0ec70 SHA-1: b16aadff933987cc53ed4f7368a0fed19f9d6058 SHA-256: 0ec728087e7ff86aedf1454fd2ea5dea5c7db95805e9cb3f6e61434aeb5efa15

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier, containing an XFA form with embedded JavaScript. The JavaScript code, although heavily obfuscated, likely attempts to download and execute a second-stage payload. The presence of XFA and embedded scripts points to an exploitation of client-side vulnerabilities within PDF viewers.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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_00000184.bin` `528fc833778604dbbf464481bd3dbad722540788bb4980e564bf0c4ff21300c3`	pdf-embedded-script	PDF raw stream script payload at offset 0x184	43489 bytes

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