Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 d42e0c5e806ce1da…

MALICIOUS

RTF / .DOC

11.0 KB
MD5: 1496e2bb95b4a63657ded5a4a195eab6 SHA-1: ae42425c08e22249e00d87829d681e80c56ed7c4 SHA-256: d42e0c5e806ce1da5ee63adcaf229adb88e162eac058201a24e69869217e70c7
240 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1559 Component Object Model Hijacking T1559.001 Component Object Model T1059 Command and Scripting Interpreter 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). This vulnerability allows for the execution of arbitrary code upon opening the document, likely to download and execute a second-stage payload. The ClamAV detection explicitly names this exploit.

Heuristics 6

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • 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
  • ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
  • \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_off00000114.bin
0c71527a2fa046cfeab9d1706b01b502aef39df0c4c065035bb086a5a4eabd2c
rtf-objdata-decoded RTF \objdata at offset 0x114 5274 bytes