RTF / .DOC malware analysis — malicious · 0f38611cf3ce91ce

MALICIOUS

RTF / .DOC

367.9 KB

MD5: bda10b54c4f67eeb4fd2d6fe233143ff SHA-1: 9708a62ff55d37ce155b0f90ef9a1844bed0ad64 SHA-256: 0f38611cf3ce91cecbd57dcc181ff39960f79691a719ecd8e6102dd08689c469

182 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF document contains embedded OLE object data, specifically related to the Equation Editor, which is a known vector for exploiting CVE-2017-11882. This exploit likely facilitates the execution of a second-stage payload, indicated by the high-entropy carved artifact 'objdata_00_off00001558.bin'. The presence of ".bin" suggests a potential executable payload.

Heuristics 5

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.
Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\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_off00001558.bin` `defcbe969232609d7e54eb343a05289cfd224fe1155177f26cdee86815ca34e8`	rtf-objdata-decoded	RTF \objdata at offset 0x1558	185391 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.