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

Static analysis result for SHA-256 e9cf47dccc13ca81…

MALICIOUS

Office (OLE) / .XLS

1.13 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-24
MD5: 2e5a594ea1010970ee6ad1e290124e5e SHA-1: 1109ef19f4deb9c20d0419f5e56a17eec063c656 SHA-256: e9cf47dccc13ca81bdac8f709d9e57f1e9f2348e0b71bbcff08b90cd78ed5fc7
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 the exploitation of a known vulnerability in Microsoft Equation Editor. This exploit likely delivers a secondary embedded PDF payload, as suggested by the POLYGLOT_CHILD_PDF_STATIC_TRIAGE heuristic. No VBA macros were found to contain executable statements, and no malicious URLs were extracted.

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
b990f1c193737166930e795b9abfec7b1a8b1d445bfca2149a75efd08e73c251		 ole-package OLE Ole10Native stream: MBD002D47A8/OLe10naTIve 1735 bytes
polyglot_child_pdf_off00049e00.pdf
59b2bc9c9eb9759d21e1c632d563d4536bf86dc5ac7bab6e1d32b7119a4debf4		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x49E00 884736 bytes
polyglot_child_pdf_off00001000.pdf
10238dfda86d340b183f2ab04c11126bba842b0ae0e2ebe371d7656cc2e07f68		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x1000 1183232 bytes
polyglot_child_pdf_off00006200.pdf
a698838a36874742065ab74acd9efa7e36e378e40cf1f75a290a78d6691d3ed7		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x6200 1162240 bytes
polyglot_child_pdf_off00009600.pdf
9c50283f7aa89aa4cdac9f0d7f7129e344e4ac28712587e5fc813facf63cc007		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x9600 1148928 bytes

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