Malicious PDF — malware analysis report

Static analysis result for SHA-256 647e5a687c9521ca…

MALICIOUS

PDF

79.4 KB
MD5: aeef55bd6f40a915b56e7fd80667b45e SHA-1: 92e7707206ca82ed8c95ff2ac5ea938bddba255a SHA-256: 647e5a687c9521ca7d0051fe43e494152a08d9d0bdd029377d286e5b2c0cb2ef
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms, to achieve code execution. The presence of an embedded file and the ML classifier's high confidence further support its malicious nature. The benign URLs found are likely decoys or unrelated to the exploit itself.

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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
a7498d87c24fd9034afcb6540409833906ae0f8dd45dd8a77412552fb0fb5188
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80513 bytes