Malicious PDF — malware analysis report

Static analysis result for SHA-256 723fff4ac03e4239…

MALICIOUS

PDF

101.9 KB
MD5: 523a4b21fb98a6d0663f84eb9c855f31 SHA-1: 9b6db955c34d703e66b43b0c4d4593c624bd5ebf SHA-256: 723fff4ac03e4239e451390fb91e8670702427645bd35a3be3dc19a2e044dba8
168 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript within an XFA form, which is known to be exploited by CVE-2010-0188. This exploit targets Adobe Reader and is designed to execute arbitrary code. The embedded script, although truncated, appears to be JavaScript, indicating an attempt to download and execute a secondary payload. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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_00000346.bin
35b180a8d2b2890eceb5411a974ec7bee164093031a64663f1ef15e0e56854e2
pdf-embedded-script PDF raw stream script payload at offset 0x346 103655 bytes