Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 2650ead217f79f2e…

MALICIOUS

RTF / .DOC

8.7 KB
MD5: 63371f932502309d51daffe5e7fb738c SHA-1: c8c2090c46b0d3297296d970964dbe77ae6b4d7e SHA-256: 2650ead217f79f2e54ebe77195890df04304769b0cefcff7123278d706f5a169
240 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE objects, specifically triggering the Equation Editor vulnerability (CVE-2017-11882). This indicates the file is designed to exploit this known vulnerability for arbitrary code execution upon opening. The ClamAV detection further confirms the malicious nature, identifying it as Rtf.Exploit.CVE_2017_11882-6584355-1.

Heuristics 6

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • 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 2 \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_off00000096.bin
e43fdb7fbfea5ffec93dcdd1656a18b66b8f3224f415c595d6835240e34697d1
rtf-objdata-decoded RTF \objdata at offset 0x96 4174 bytes