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

Static analysis result for SHA-256 79a6572c169ef394…

MALICIOUS

Office (OLE) / .XLS

1.47 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 40188d06e6a5ffcf8cf866d391bb6d48 SHA-1: 2cdf3cd8b17edfd5489cbeee17bb8165b851464e SHA-256: 79a6572c169ef39459bcde1486e4fbf8d9d937249592851dea65327ca50b7680
112 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to load a remote resource. The embedded URL points to a suspicious domain, likely serving as a download location for a second-stage payload. Although no VBA macros were found to be executable, the presence of an embedded PDF with suspicious static findings suggests a multi-stage attack. The primary mechanism appears to be exploiting a known vulnerability to achieve remote code execution.

Heuristics 5

  • 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.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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 https://000000000000000000000@url.odds.team/eQcJyS?&plover=fascinated&skullcap=quarrelsome&rubber
    • http://schemas.microsoft.com/office/2006/metadata/longProperties
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml
    • http://schemas.openxmlformats.org/officeDocument/2006/cusI
    • http://schemas.microsoft.com/office/2006/metadata/contentType
    • http://schemas.microsoft.com/office/2006/metadata/properties/metaAttributes
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
polyglot_child_pdf_off00001c00.pdf
a0c31d5a6306434073c37c5c07081eddf0be61818c9e223f03dac4e0014c90e9		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x1C00 1534464 bytes

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