Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fac757441103bd…

MALICIOUS

PDF

12.8 KB
MD5: 618851f2b537916195f036215fe670d2 SHA-1: 8ad897920137ccca7525a7fec3e5e1ee241b4543 SHA-256: 78fac757441103bd2375d5e29d40478c174ae8845878aeae857bdf9da297698a
168 Risk Score

Malware Insights

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

The PDF sample contains an XFA form that exploits CVE-2010-0188, a known vulnerability in Adobe Reader. An embedded JavaScript payload is present, which is likely responsible for executing the exploit and potentially downloading 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_00000384.bin
76da62dcce557f71e5f1291c29ea01f6639fc0db8901c1a133f5d85224b0d242
pdf-embedded-script PDF raw stream script payload at offset 0x384 12312 bytes