Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 ac22cd7debc33e9f…

MALICIOUS

RTF / .DOC

15.3 KB
MD5: 9e122d3beaf2f52dafa8658025484cf5 SHA-1: 6739bf7260f3686daab44966125dd31d23bf405e SHA-256: ac22cd7debc33e9ff05ff47f9cec2ca975a6cb014a91f6c8751bfca099a2714a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The file is an RTF document that contains an embedded OLE object, specifically targeting the Equation Editor vulnerability (CVE-2017-11882). This exploit is known to allow arbitrary code execution. The presence of ` tfobjdata` and ` tfobjupdate` directives further indicate the exploitation of OLE object handling. The ClamAV signature confirms the detection of this specific exploit. The likely intent is to download and execute a second-stage 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
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001aee.bin
7ca591ff602df47abb29226dc7ff7ba5dff878c8a482bd371cefa6d24f228925
rtf-objdata-decoded RTF \objdata at offset 0x1AEE 4175 bytes