Malicious RTF — malware analysis report

Static analysis result for SHA-256 d832829db908195e…

MALICIOUS

RTF

1.08 MB Created: 2019-09-17 13:59:00 First seen: 2020-05-25
MD5: dbf793141018862e95a2444a6989c040 SHA-1: b2d99f3bd75477b7728bd96a147e358cbffb114f SHA-256: d832829db908195e6cd8d934fd47166e3c449b3cbbe438e3a7be94a63253076b
142 Risk Score

Malware Insights

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

The RTF file contains an embedded OLE object that is configured to update automatically. This, combined with the critical heuristic firing for CVE-2017-8759, indicates the file is designed to exploit this vulnerability for client execution. The embedded URL, though benign, is associated with the OLE object, suggesting a potential download or execution chain.

Heuristics 5

  • 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.
  • \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 In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00107895.bin rtf-objdata-decoded RTF \objdata at offset 0x107895 1413 bytes
SHA-256: 742d045e591dbaaecf224e6b3fe5c6b509d19baee8a6c8e29a5703add0f79196

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