RTF malware analysis — malicious · 4447ee5ae61222e4

MALICIOUS

RTF

143.8 KB

MD5: 6d5ae7c8b0fb8e79842536e2bf955919 SHA-1: d602371d79ed91dcd31c6981277eb716394d0c3a SHA-256: 4447ee5ae61222e4c8caee159c6b575018d569df58de870823ca64836da360ed

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains an embedded OLE object, specifically targeting the Equation Editor vulnerability (CVE-2017-11882). The ".objdata" section and ".objupdate" heuristic indicate that this object is designed to be activated upon opening, likely to download and execute a second-stage payload. The document body appears to be a list of part numbers, suggesting a lure for a specific industry, but the primary malicious functionality is driven by the embedded OLE object.

Heuristics 4

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_off000005e7.bin` `4f07d7686b08d56a52dbf8d96a38530413fed155f213aa30755aabcba13f4ae1`	rtf-objdata-decoded	RTF \objdata at offset 0x5E7	32518 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.