Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 390d0dba0de9d18e…

MALICIOUS

RTF / .DOC

2.80 MB Created: 2019-09-17 13:59:00
MD5: a5ea0a495089e155f88fa94f0fd4ea4b SHA-1: ae31f3d2d9b5cc9d2927dfc19d499776a9fea81b SHA-256: 390d0dba0de9d18ec1434794e2ad8e48216679f02b99dc270cc61493ca479b21
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an RTF document containing embedded OLE objects, indicated by RTF_OBJDATA, RTF_OBJEMB, and RTF_OBJUPDATE heuristics. The RTF_OBJUPDATE heuristic suggests that the embedded object is designed to be activated automatically. While the embedded URL appears benign, the overall structure strongly suggests a malicious intent to exploit OLE object activation for payload delivery. No scripts were extracted, limiting further analysis of the payload execution.

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.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2{\3\K\K\K\K

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off002b767b.bin
030425dd0070b78dd81d2bbbeac96ea5ecfed6d0d19509a2bbdf170a69f88ab9
rtf-objdata-decoded RTF \objdata at offset 0x2B767B 1478 bytes