Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 ba296b589e744401…

MALICIOUS

RTF / .DOC

15.8 KB
MD5: c4452e9e9f9fce7251194fa3c9178fed SHA-1: 1e029e97e5ec6d3c584fadec8dd0e0be04187a6b SHA-256: ba296b589e744401fad363d2463420d406ac944416100c0ffe7bd983fa4ce443
160 Risk Score

Malware Insights

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

The file is an RTF document that contains embedded OLE objects, specifically triggering critical heuristics related to Equation Editor. This strongly suggests exploitation of a known vulnerability within the Equation Editor component, likely CVE-2017-11882, to achieve arbitrary code execution. No document body text or scripts were provided, but the presence of the Equation Editor exploit is a clear indicator of malicious intent.

Heuristics 4

  • 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
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001a10.bin
73d5e3a27b3302574a24d06ddfb254e0cbf284ba6cc33306255078422e076666
rtf-objdata-decoded RTF \objdata at offset 0x1A10 3661 bytes