RTF / .DOC malware analysis — malicious · 37e11701203f5290

MALICIOUS

RTF / .DOC

692.5 KB

MD5: 7cd54d11e1337fc958fb8565c2859d75 SHA-1: efb5c5083aa3b9e2ba5c81e80eee8fd81f086d4c SHA-256: 37e11701203f5290ad153598ec51d52860497c6f23c0834b2e594a228c88e7e1

162 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is an RTF document that leverages an embedded OLE object, specifically targeting the Equation Editor vulnerability. This indicates an attempt to exploit CVE-2017-11882 to execute arbitrary code. The heuristic firings strongly suggest that the decoded object contains a PE file, likely a downloader or initial payload. The presence of `RTF_EQUATION_EDITOR` and `RTF_OBJAUTLINK` are critical indicators of this exploit.

Heuristics 5

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_off00000046.bin` `4fbf3135a2b6367087c17627694889c94042dc388beb8d997ec2aeb98edb5b89`	rtf-objdata-decoded	RTF \objdata at offset 0x46	354439 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.