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

Static analysis result for SHA-256 84750ac6287c0ddb…

MALICIOUS

Office (OLE) / .XLS

802.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-07-19
MD5: 01d35baefe1ce38feffe07104ddd27d0 SHA-1: aa59f404015f4cb46fe2e607d2fabde040afefd7 SHA-256: 84750ac6287c0ddb3289f197247bf4cd8e06ff9656e5b7355aa8adf37c28f7db
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 this known vulnerability through an embedded Equation Editor object. The presence of a secondary embedded PDF with suspicious static findings further suggests a multi-stage attack. No VBA macros were found to contain executable statements, and no scripts 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://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 8

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
cf24883ece10d7daf3ce731d243019c41a22b64a4c6c4405dcf8ccc9dc1e9c78		 ole-package OLE Ole10Native stream: MBD001A86B8/oLe10NATIve 1541 bytes
font_00_sfnt_off0000817d.bin
68d167e68895a344f3603a4efd0d8438eb8fdebe759cee48f2b4adf75c76c961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817D 12100 bytes
font_01_sfnt_off00009f95.bin
50551000b9f90b3f445ee94749557d9ddf96697a74984b3ccf3d2bae66910750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F95 15820 bytes
polyglot_child_pdf_off00000e00.pdf
78cd0d40ee9c555867dbf8cde3a724de96e55407c90efa17c1686f6014fba631		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0xE00 818176 bytes
polyglot_child_pdf_off00006000.pdf
7190361c9f9385beeecaf96cf86d757ee2fbdab42cb92adbc65051ab8031980e		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x6000 797184 bytes
polyglot_child_pdf_off0000e400.pdf
cd38f1024370111b3f221a5ace808a4113bc72cdb0c9463e9dc1af1b63ed4913		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0xE400 763392 bytes
polyglot_child_pdf_off00023800.pdf
56509a4a1ccc55f63f902b21b7978f3b2bb6ecdd3141aebfa3ef20b86573001c		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x23800 676352 bytes

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