Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3f46e46cb2d9368d…

MALICIOUS

RTF / .DOC

1.19 MB Created: 2019-09-17 13:59:00
MD5: 543b51d05ed4b45cc43688f4a122ea54 SHA-1: 23340aa44c454696236cf5f0096a11e201c6c69d SHA-256: 3f46e46cb2d9368d9304cc913e852f0936b75d3fc51e9d1e4db3b0aeffbb5499
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains critical heuristic firings for RTF_EQUATION_EDITOR and CVE_2017_8759, indicating exploitation of the Equation Editor vulnerability. The RTF_OBJUPDATE heuristic suggests that the embedded OLE object is designed to be activated, leading to code execution. No scripts were extracted, and the document body was heavily obfuscated, but the presence of these critical vulnerabilities strongly suggests an exploit delivery mechanism.

Heuristics 6

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off001280b2.bin
2c2d885dc12b315c0c763c72d84d44e34646fbbb12035b4c0112f9cbf87efb3f		 rtf-objdata-decoded RTF \objdata at offset 0x1280B2 3739 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.