Malicious PDF — malware analysis report

Static analysis result for SHA-256 045fa61d04b715bc…

MALICIOUS

PDF

73.4 KB
MD5: ec874d74c9204b3d91df571945dadd76 SHA-1: 29929cbfa02ede7fa1e10d523c35638bdda0c1b4 SHA-256: 045fa61d04b715bc809a9a21abeee78388f25a35b4b12fbe29be9f22520ed468
168 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF that contains an embedded XFA form, which is known to be vulnerable to CVE-2010-0188. The embedded script, when decoded, appears to be JavaScript that likely attempts to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.

FilenameKindSourceSize
embedded_pdf_script_0000034e.bin
a4d5ee0c1629dbedca2bd1b5830fd35e6365377b9577fefebb1ca7809c376d8f
pdf-embedded-script PDF raw stream script payload at offset 0x34E 74422 bytes