Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 25b59cda4893aea6…

MALICIOUS

Office (OLE) / .XLSX

1.42 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: e8520db3903aa86bb605d05f1e75472f SHA-1: 6df79378765529b511e3e3894cacd3123fd185c3 SHA-256: 25b59cda4893aea607cbc3ab11a1d7b85a72f350c4d66bad81ccd8ab851bfcd9
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The embedded URL 'https://getabre.com/dCYEqK' is highly suspicious and likely serves as the source for a secondary payload. The presence of a polyglot child PDF with suspicious static findings further supports a multi-stage attack. No VBA macros were found to be executable, but the OLE structure itself is the vector.

Heuristics 4

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • Secondary embedded PDF body has suspicious static findings high POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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/2006/metadata/longProperties
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml
    • http://schemas.microsoft.com/office/2006/metadata/contentType
    • http://schemas.microsoft.com/office/2006/metadata/properties/metaAttributes
    • http://www.w3.org/2001/XM
    • http://schemas.microsoft.com/office/2006/metadata/properties
    • http://www.w3.org/2001/XMLSchema
    • http://schemas.microsoft.com/sharepoint/v3
    • http://schemas.microsoft.com/office/2006/documentManagement/types
    • http://schemas.openxmlformats.org/package/2006/metadata/core-properties
    • http://www.w3.org/2001/XMLSchema-instance
    • http://purl.org/dc/elements/1.1/
    • http://purl.org/dc/terms/
    • http://schemas.microsoft.com/office/internal/2005/internalDocumentation
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsd
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dcterms.xsd

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
stream_009_off00035236.bin
c61015bf31fbeea6dbae8ab8c914b5628a4391dbd3d3297fb103999ea685f8a4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35236 94828 bytes
font_00_sfnt_off00028714.bin
447f25ccd3562d1d9a939f7a077b5f46a1dee55bbf3598ed523347dfd6c204ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28714 77992 bytes
font_01_sfnt_off0002e85b.bin
d269edff3dd342db188fc9cce286db63297a4350b415b01f0acb02cdfe15e62b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E85B 224084 bytes
font_03_sfnt_off0003d8e3.bin
9baff418df77a3d6013f8f3214f85e7a2c20de4dbae9a41768f820f0e6da3a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D8E3 5252 bytes
polyglot_child_pdf_off0008c600.pdf
3326a0dec40325b5ac3cd361373619464e330b4c0c9ea1c3359d075cbc978304		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x8C600 919040 bytes

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