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

Static analysis result for SHA-256 6a65f455f5ad210f…

MALICIOUS

Office (OLE) / .XLS

1.13 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-25
MD5: 6c6314bd041658b4c5bd339e628dfdc0 SHA-1: 48f273f953a032b428b5f12b55fbe6a387b76920 SHA-256: 6a65f455f5ad210f3371fe1af860c35d166d34c1d4bc6f881653bf8f0e323cf4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1559.002 Component Object Model Hijacking

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates exploitation of a known vulnerability within the Equation Editor OLE object. This object contains a payload that, when executed, likely triggers the delivery of the embedded PDF file, which itself exhibits suspicious static findings. No VBA macros were found to be executable, suggesting the primary attack vector is the OLE object exploit.

Heuristics 6

  • Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE
    An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
  • 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.
  • 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.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

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
ole10native_00.bin
60e5eba9bbc517e8d28d3b22848a7a40ca396ef9415af68675931a79d27f3b56		 ole-package OLE Ole10Native stream: MBD0018C09C/OlE10NaTIve 1283 bytes
polyglot_child_pdf_off00049e00.pdf
4a90f7be5f0e773c9077f9a3d1ee6cf512a3ec1820c54645dc4b67451c48b5a6		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x49E00 884224 bytes
polyglot_child_pdf_off00001000.pdf
197a6d4560f3678f2b0b2d619189f2303b0228c4194fd95c9016e4f4e863678b		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x1000 1182720 bytes
polyglot_child_pdf_off00006200.pdf
7fd87e06b9054501ff3c24b25c074e90aa1188535ad4aa4ce1b9a2b57391e058		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x6200 1161728 bytes
polyglot_child_pdf_off00009600.pdf
c0a883c8a5370cfa6a0d0a8a28ef212257a7f512ed631ef67c386e797c018b76		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x9600 1148416 bytes

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