RTF / .DOC malware analysis — malicious · 61e4149ac0701e15

MALICIOUS

RTF / .DOC

128.2 KB

MD5: cd250ce489570b8cda966261280088cb SHA-1: d5909af03dc0b6a6dfbcdab8bda3695543c68764 SHA-256: 61e4149ac0701e15e4d5ae4c32667450aeba67a4d45bb2ae7959f0b543d20e56

222 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF document contains embedded OLE object data, specifically related to Equation Editor. Critical heuristics indicate the presence of a decoded Equation Editor payload and a PE file, strongly suggesting exploitation of CVE-2017-11882. This vulnerability is used to execute arbitrary code, likely to download and run a secondary malicious payload. No document body text or scripts were extracted, limiting further analysis of the payload's specific actions.

Heuristics 6

Equation Editor OLE1 native payload — CVE-2017-11882 related critical CVE related CVE_2017_11882_RELATED

RTF decodes to an OLE1 Equation.3 embedded object whose native data is large and payload-like, and \objupdate requests automatic activation. This is the delivery shape used by Equation Editor RCE documents such as CVE-2017-11882/CVE-2018-0802, but the malformed MTEF record needed for exact attribution was not recovered.
Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITOR

RTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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.

Filename	Kind	Source	Size
`objdata_00_off00001fa6.bin` `4b409b312ad85d9fab62d0ffd20a0f7a5f5a9a8edeca90660251b42a26cc9c86`	rtf-objdata-decoded	RTF \objdata at offset 0x1FA6	61509 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.