Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 44fab41a5ffc0c4f…

MALICIOUS

RTF / .DOC

189.7 KB
MD5: a08f1536f1d1a3b68da8a7d1ca0ced60 SHA-1: e017f0c77683c24f48728996be8ed22eada1bdf7 SHA-256: 44fab41a5ffc0c4f38c7fff04e740a6150ba90e1b6b3088821be7fad6252ffc3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an RTF document containing embedded OLE objects, specifically triggering heuristics related to Equation Editor and OLE activation. ClamAV identifies this as Rtf.Exploit.CVE_2017_11882-6584355-1, indicating exploitation of the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the embedded object is activated.

Heuristics 5

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000b9.bin
a76a14e0eac85c0b97df4fbf952ab9de054e89ac00b712df44e428ecdd910bc1
rtf-objdata-decoded RTF \objdata at offset 0xB9 65099 bytes