Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a55a75369c0f58…

MALICIOUS

PDF

16.2 KB
MD5: 4d1cedae8edffb0c86aaccc9d168ce08 SHA-1: 6f976a15b8fd2c72c3ca8be78b5a4cfaac38bbfd SHA-256: 87a55a75369c0f585999fad6aa31f6cbc5fd5233e83bdac990f73819bc284ddd
168 Risk Score

Malware Insights

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

The PDF file contains embedded XFA content that triggers CVE-2010-0188, an exploit targeting Adobe Reader's LibTIFF component. The embedded script, identified as JavaScript, likely attempts to download and execute a second-stage payload, although its full functionality is truncated. 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_00000359.bin
f5d63eecc06ac4fabba9293a4c04e7e542efc2e25e30b836510dd572d7cfbb29
pdf-embedded-script PDF raw stream script payload at offset 0x359 15885 bytes