Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 56f71de1789435c7…

MALICIOUS

RTF / .DOC

22.7 KB First seen: 2022-07-10
MD5: 56c83a1f93ba55ba5ab3f7b5d01d0f2f SHA-1: 45b0deb138d771c04787d17a62aa5830805f462b SHA-256: 56f71de1789435c7f905f44b3e406382acfbfe1723a2676a6d5fdccff7c5523c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The RTF file contains OLE object data and an objupdate directive, indicating an attempt to embed and activate external content. While no specific document body or script content was provided for detailed analysis, these heuristics strongly suggest a malicious intent, likely to exploit OLE vulnerabilities or deliver a secondary payload. The presence of multiple high-severity heuristic firings supports a high confidence in the malicious nature of the file.

Heuristics 3

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000c71.bin
c93140c24b339263f79bc8341d6d53f3e8cf0f1bc2e8b61e7148005c4657c02a
rtf-objdata-decoded RTF \objdata at offset 0xC71 4282 bytes