Malicious RTF — malware analysis report

Static analysis result for SHA-256 938b890d0441ae6c…

MALICIOUS

RTF

13.2 KB
MD5: 3a9d2cf7fab58d2345366302c45de71f SHA-1: 4ab49b730e47012b66873dec582a54eb7706f1c6 SHA-256: 938b890d0441ae6c38e5e0deb5192cf63b3cc45a9f85ff2085f470afbac98b62
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The file is an RTF document containing an embedded OLE object that leverages the Equation Editor vulnerability (CVE-2017-11882). The `RTF_EQUATION_EDITOR` and `RTF_OBJUPDATE` heuristics indicate that the embedded object is designed to be activated and execute code. The `EMBEDDED_URL` heuristic suggests that the exploit likely leads to the download of a secondary payload. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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
  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000093b.bin
a70614db589bcfe4a9bdb3af733c027087ebd4da034b887d8c0b563d3e0029e1		 rtf-objdata-decoded RTF \objdata at offset 0x93B 4210 bytes

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