Malicious RTF / .OLE — malware analysis report

Static analysis result for SHA-256 b1043ddfea2d254a…

MALICIOUS

RTF / .OLE

319.1 KB
MD5: 0551b96ff10a105c8d022e83afb93a42 SHA-1: 3c3679a0cf58a562d6cbe703b82d2601a634e2bb SHA-256: b1043ddfea2d254aa55422dae507827459d4c10a7fd75bba1d14bbf0073ad71d
182 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an RTF document containing an OLE object, specifically triggering the Equation Editor vulnerability (CVE-2017-11882). This vulnerability allows for arbitrary code execution. The ClamAV detection confirms the exploit. No document body or scripts were extracted, but the presence of the Equation Editor exploit is a strong indicator of malicious intent.

Heuristics 5

  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001752.bin
5505515eca46f4e6ac4db0819e9abab1a4b3a8a06764da77c2a0d455dd7af30e
rtf-objdata-decoded RTF \objdata at offset 0x1752 160325 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.