Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6e13540738e253…

MALICIOUS

PDF

459.3 KB Created: 2017-08-15 17:41:54 +01:00
MD5: 349fa4398dab49e446b7d707e636c1f9 SHA-1: 2cd0afe81853f55d7eba5793c448e627a0aeed52 SHA-256: 2c6e13540738e25312e1d765fdf2ae62204fc6bc41ea9cd53df4921045589f20
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains XFA form elements and is related to CVE-2023-26369, indicating it's designed to exploit a PDF reader vulnerability. The embedded URL points to a Google Drive download, likely serving as a distribution point for a secondary payload. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9393

Heuristics 4

  • TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED
    PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/
    • https://drive.google.com/uc?export=download&id=0B-7_s0SBSqQ-ZzlhZTlfcTB1eFk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/id/
    • http://ns.adobe.com/xap/1.0/
    • https://drive.google.com/uc?export=download&id=1FmJoD4SYLZMrV4nvgh8VwxI4c_7VKUwy
    • https://drive.google.com/uc?export=download&id=1bQvsDYUiGjRllo0a7kljh60J6-WdnNRG
    • https://drive.google.com/uc?export=download&id=1jad-VNaLf3pfAqr9o612ZrE3QER5x3ga
    • https://drive.google.com/uc?export=download&id=1EmDbstNLjfBdpRs0UCjwBHeIPNmfpsH6
    • https://drive.google.com/uc?export=download&id=1r92b30T8GFF-h6CBKKRa49rx6ipC8E7I
    • https://drive.google.com/uc?export=download&id=1RlQ1lww175gTJihkFrcTN11-9_7y80Iq
    • https://drive.google.com/uc?export=download&id=1VufSeNSHRm1EPzBJ9meEgtFvsuXB0ksi
    • https://drive.google.com/uc?export=download&id=1u4yF3YfXVAia_y5ghzDyCJD7QDrKN-jz
    • https://drive.google.com/uc?export=download&id=1jMN_Q0tpSFNvrxJv4yaXyq6lrPgNE5Nq
    • https://drive.google.com/uc?export=download&id=117qqFkuhmnBAo5hEJGJDUmUCf0VTVhZI
    • https://drive.google.com/uc?export=download&id=1S9zcBZmLoWZPa9DgvCRrrYY__f3ekJRV
    • https://drive.google.com/uc?export=download&id=1KMgStKrz9gl00gf5MUm0uN09-C9Lglbv

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008dcf.bin
2b4c360afec4ed97d0c2a1aa1c8789c9199cda15621d2576b98b5a4fa56c3f8a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8DCF 212556 bytes
stream_006_off00021f66.bin
256a96a3a8323d5e18ff955394e79c2d8801637967b9f496bc62256aff22c2e9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21F66 1502970 bytes
stream_008_off000381ac.bin
b52520aa677e64ee9cde1a0b1a000ccdd74da962f5b90e6384ca90d83d41861f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x381AC 204728 bytes
stream_010_off00050a2b.bin
be4a46d56971409298065da49d2bcb6e0987aa7b6e154003f6ec661d3acfe8ed		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A2B 204836 bytes
icc_00_off000002be.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x2BE 3144 bytes
font_00_sfnt_off00000fde.bin
1235f075efe03e8e70ab2026b8f5aa7617c3ac5f9ea9e3f4628b27841e1145d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE 10404 bytes

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