Malicious RTF — malware analysis report

Static analysis result for SHA-256 8bbd6ef513911bf6…

MALICIOUS

RTF

990.1 KB Created: 2019-09-17 13:59:00 First seen: 2020-09-15
MD5: a914b030c1806305a17f1e1ba5a792af SHA-1: f23a628a778353fd66cf1e4acb0dc635b195a744 SHA-256: 8bbd6ef513911bf6d9ff5b3af8a8902afbfc87283ae1e63a13570e0e1009ed6b
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 automatically update using \objupdate, triggering an exploit for CVE-2017-8759. This indicates the file is designed to execute arbitrary code upon opening. The embedded URL, while 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_off000eebe8.bin rtf-objdata-decoded RTF \objdata at offset 0xEEBE8 1414 bytes
SHA-256: cb41f7cc51d6a5f4559a1b05c94d0d2bbbca5b21eee736dda18654d4b3e296f0

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