Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 9d67ea5f7df7d0ee…

MALICIOUS

RTF / .DOC

1.11 MB Created: 2019-09-17 13:59:00
MD5: 8a6b2000464fb2adf6b9e2308f921dae SHA-1: 0662912ada522825fe22ed4dc7f806f4f888d1e5 SHA-256: 9d67ea5f7df7d0ee786c38e728f1ec5e458837d0166edb719d23115879870fba
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The file is an RTF document that contains embedded OLE objects, with a critical heuristic firing for CVE-2017-8759. This indicates the document is designed to exploit this vulnerability upon opening, likely to download and execute a secondary payload. The presence of OLE object data and the specific CVE exploit strongly suggest a malicious intent to compromise the user's system.

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0011350a.bin
c4047aa478df03b48dc75065ac6b2b194fd3de885eb37d98201d3c2bc3780f73
rtf-objdata-decoded RTF \objdata at offset 0x11350A 1435 bytes