RTF / .DOC malware analysis — malicious · 05a6203fed91002b

MALICIOUS

RTF / .DOC

459.9 KB

MD5: 710e66864fa3d69510432f1aed62cfe2 SHA-1: 72970bc5f1d049871801bf0ee1ab63e66b65cc50 SHA-256: 05a6203fed91002bc208e5a884b16bfbe65a8de48a8a6b07aa525e688682b700

182 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains an embedded OLE object that leverages the Equation Editor vulnerability (CVE-2017-11882) to execute arbitrary code. The heuristic firings confirm the presence of a decoded Equation Editor payload and an associated PE file, indicating the likely execution of a second-stage malicious artifact. The extracted artifact 'objdata_00_off0000137a.bin' is a key indicator of this malicious activity.

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.
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
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_off0000137a.bin` `9c4c4f7fd9c4f16c7d772b1447122ee9d96bf7030d0040d47efee7aba19f1156`	rtf-objdata-decoded	RTF \objdata at offset 0x137A	232896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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