PDF malware analysis — malicious · 5c8f97528c80dcc5

MALICIOUS

PDF

73.4 KB

MD5: 74d4b8190b14bdeb2565845253d5ee29 SHA-1: 994697db9f6c73d2f3444fe3fd98e6351c84d0bd SHA-256: 5c8f97528c80dcc594050aa88c8362649dfca44acd2ec0e427ee72dc0ab955c3

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript within an XFA form, which is flagged as malicious by multiple heuristics and a machine learning classifier. Specifically, the 'CVE_2010_0188' heuristic indicates exploitation of a known Adobe Reader vulnerability. The embedded script, though truncated, appears to be JavaScript, suggesting it's intended to download and execute a second-stage payload. The benign URL found is likely a red herring or part of the XFA structure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
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://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_0000034e.bin` `288f8189d7980a21e9be37ba189876f66dc44b7dabc46ca15d15f1b626084f5a`	pdf-embedded-script	PDF raw stream script payload at offset 0x34E	74422 bytes

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