RTF / .DOC malware analysis — malicious · f0fbd7ed1921ad8c

MALICIOUS

RTF / .DOC

334.3 KB

MD5: 55792544ad840eaa0fdbe5cc04683529 SHA-1: 80c482b268197f0d1766a406e820f751b45de184 SHA-256: f0fbd7ed1921ad8c47a0b91b32487d4cdeb7bd72ea54f49434ff91da0273e31c

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter T1059.003 Scheduled Task/Job T1566.001 Phishing T1071.001 Application Layer Protocol – Web Protocols T1071.002 Application Layer Protocol – Email

The file's structure, particularly the use of extit{objdata}, extit{objemb}, extit{objautlink}, and extit{objupdate} control words within the RTF document, strongly indicates a malicious intent. These elements are commonly associated with Equation Editor exploits and other document-based malware droppers. The document's instruction to enable macros and the presence of a composite moniker further support this assessment. The embedded OLE objects likely contain a secondary payload, which is downloaded and executed via a URL. The document is designed to bypass Office macro security settings and establish a foothold on the victim's system.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
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 4 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000965.bin` `46f13e5bce51d75631f5f07c87516897754f43343d13db44a851af6600c7b95e`	rtf-objdata-decoded	RTF \objdata at offset 0x965	59603 bytes
`objdata_01_off00007114.bin` `91a8cfa9d2d15fd1c6ab1f806273eb15adadd8fe1b02eddf36467e0571513276`	rtf-objdata-decoded	RTF \objdata at offset 0x7114	59576 bytes
`objdata_02_off000255c3.bin` `a8e170497da15decc11753d202c99c86f7a7ffd2d52481e6b9c79a5403675379`	rtf-objdata-decoded	RTF \objdata at offset 0x255C3	2632 bytes
`objdata_03_off00026b66.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x26B66	12297 bytes

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