RTF malware analysis — malicious · 4babb43e6c0f28ca

MALICIOUS

RTF

477.7 KB Created: 2019-01-07 23:54:00

MD5: d0481f63bb2cd902e98421f4beb490b5 SHA-1: 8b690e7e77513ad4bcdea2bc9acb63dc99482301 SHA-256: 4babb43e6c0f28ca013aaeb420d41a0c260af5bd55c994a459bc2d3faedd77c4

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects, indicated by RTF_OBJDATA and RTF_OBJEMB heuristics. The presence of RTF_OBJUPDATE and RTF_OBJCLASS_PACKAGE suggests that these embedded objects are designed to be activated, likely leading to the execution of embedded malicious content. The specific nature of the payload is not discernible from the static analysis alone, but the technique points towards a malicious OLE object delivery mechanism.

Heuristics 4

\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.
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
OLE object data medium RTF_OBJDATA

RTF contains 5 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000a71.bin` `79fc833951a6fdc713f60773d32313fa223930201e6336d323a9ea978de70c01`	rtf-objdata-decoded	RTF \objdata at offset 0xA71	35899 bytes

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