RTF malware analysis — malicious · 947b31383bee46a9

MALICIOUS

RTF

13.0 KB

MD5: c11c7bd737d1dcf126e3cea347737ae6 SHA-1: 06a1a303f4def56dc56257425239f5abea7c1b33 SHA-256: 947b31383bee46a9d4699deb8821af8f2ffc338716c13e981b7adb4e4541af91

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is an RTF document that leverages the Equation Editor vulnerability (CVE-2017-11882) to execute arbitrary code. The presence of \objdata and \objupdate heuristics strongly indicates the exploitation of OLE objects within the RTF. This technique is commonly used to download and execute a second-stage payload, leading to a full system compromise.

Heuristics 3

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001da1.bin` `aa5ddafd11da875d3fa0e6791d6557df7f3516cfb40143906609b9d1f8c2a4ad`	rtf-objdata-decoded	RTF \objdata at offset 0x1DA1	1769 bytes

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