RTF / .DOC malware analysis — malicious · 243600c97a3cdea2

MALICIOUS

RTF / .DOC

433.9 KB

MD5: 2fe6a8be9b18de74203c7332bfb4e54e SHA-1: a6c90c36e7a1d4c91bea5b92f6617756400fdfdd SHA-256: 243600c97a3cdea21439154077ee9f731521335ad0c13d5048afed40d2129468

182 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious Attachment T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The RTF document contains OLE object data and specifically triggers the CVE-2017-11882 vulnerability related to the Equation Editor. This exploit is known to be used for delivering secondary payloads. The high entropy of the extracted artifact suggests it is likely a packed or encrypted executable, further supporting the payload delivery hypothesis. No specific family could be identified from the available evidence.

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 2 \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_off00001402.bin` `81083ce78964dd93f5ae5e022728a1cf47dcff84e93debe2ac62fa7039660106`	rtf-objdata-decoded	RTF \objdata at offset 0x1402	219500 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.