Malicious PDF — malware analysis report

Static analysis result for SHA-256 756d67269e85235b…

MALICIOUS

PDF

100.0 KB
MD5: d7cd872de7c19e6a06c3330c037a122f SHA-1: 80186de41fe5e9303592560bd0fed38b049103b8 SHA-256: 756d67269e85235be18363d0b154f2a566d07fbd95d202224a1383a38f04bffb
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 related to XFA forms, to achieve code execution. The presence of an embedded file and the ML classifier's high confidence score further indicate malicious intent. The benign URLs extracted do not detract from the exploit's malicious nature.

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
31844be016214d3b128e9f3a628af79435551ae504321235388958bdfc0137b3
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101634 bytes