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

Static analysis result for SHA-256 0a3237479695f511…

MALICIOUS

Office (OLE) / .XLSX

1.70 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 0d4adfe293e1abf1288f6ce80394f61a SHA-1: 53427a2859cf3a9437b030cd26d114936477f7e7 SHA-256: 0a3237479695f5114c3bb50660f517f1e5842645677203d68cd098bd07cb04b7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic 'CVE_2017_0199: OLE2Link / URL Moniker' indicates the file is designed to exploit this vulnerability to download a remote payload from the URL 'https://e.vg/ocLrDty?&＠ооо'. The presence of an embedded PDF with suspicious static findings and an external URI 'https://www.eventmediaservice.ch/droits-politiques/' further supports a multi-stage attack. No VBA macros were found to be executable, but the polyglot nature suggests a complex delivery mechanism.

Heuristics 7

  • 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 critical 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://e.vg/ocLrDty?&＠ооо
    • https://www.eventmediaservice.ch/droits-politiques/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/g/img/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 3

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_off00001400.pdf
ff5bdbc3e1ff8694868ef86a33a3e509f1a0cc64117b61b1c7fca5a02887c40a		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x1400 1777664 bytes
polyglot_child_pdf_off00037a00.pdf
4ae6943b84877bdad04fa18d5192e461a53ba0faa01b1247f6b0a72b0fd35042		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x37A00 1554944 bytes

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