Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 48e637e91917e8a8…

MALICIOUS

Office (OOXML)

180.7 KB Created: 2021-04-07 13:27:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-04-10
MD5: b5e0512ca67dd8dcec8ac76a787b9385 SHA-1: 3e810263038e0373f1fec8efded3aae192e7f60b SHA-256: 48e637e91917e8a864b98a2b7ab19c0bf929c29887344843240bffb0d10b7703
82 Risk Score

Heuristics 3

  • Embedded Office object carries macros critical OFFICE_EMBEDDED_MACRO_OBJECT
    This document embeds a second Office file that itself contains a VBA macro project or an Excel 4.0 (XLM) macro sheet. Hiding a macro-bearing workbook or document inside another document — frequently under an obfuscated, non-standard part name — is a macro-smuggling technique that defeats scanners which only inspect the outer document's macro storage. No benign authoring workflow stages a hidden macro project this way.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an 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/drawing/2014/chartex In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://purl.oclc.org/ooxml/officeDocument/relationshipsIn document text (OOXML body / shared strings)
    • http://purl.oclc.org/ooxml/officeDocument/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://purl.oclc.org/ooxml/drawingml/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://purl.oclc.org/ooxml/wordprocessingml/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/Planilha_Habilitada_para_Macros_do_Microsoft_Excel2.xlsm 13964 bytes
SHA-256: f9f8626c4177ae2255a8ce087f38b08e57cd3f54061bfb484367130ec943462f