RTF / .DOC malware analysis — malicious · f8ccac0695641b51

MALICIOUS

RTF / .DOC

804.9 KB

MD5: c42bc0086aa80e0e860fe809b051695d SHA-1: 514de7a81190cdcf27771d887683b067d332caa5 SHA-256: f8ccac0695641b514841e966ac4b901f2929ff145a526455b7e92f721119f46f

202 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

The RTF file contains an embedded OLE object that leverages the CVE-2017-11882 vulnerability in Equation Editor. This vulnerability is known to be used for arbitrary code execution, typically to download and run a secondary payload. No document body text or scripts were extracted, but the critical heuristic firings strongly indicate exploitation of this specific CVE.

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.
\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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
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_off00001cce.bin` `4a82ae6967eef0bfd3ee9d394fb166432fdaf23f76249786c9a801ba2e04d10c`	rtf-objdata-decoded	RTF \objdata at offset 0x1CCE	408355 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.