Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2eeaebce8c9d0e1…

MALICIOUS

PDF

16.5 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 0bab98c7442e4fa8eba9edff60adabd7 SHA-1: 60ddbebe7de06f9ed1caf304ce2314905e59da65 SHA-256: b2eeaebce8c9d0e1bf4aea143e8289ba5e8fd121d69fcf650023f8217c8a9565
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

This PDF file was flagged by ClamAV as Pdf.Exploit.Dropped-81, indicating it contains an exploit. The ML classifier also strongly indicated maliciousness. The presence of embedded files and scripts, along with the XFA form, suggests the PDF is designed to exploit a vulnerability and drop a secondary payload. The specific exploit and payload are not detailed in the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
e2e0f6c5cb2e0b2697da89386bfc3718eedaf1b6a2b1d24dd1176d27117bf77a		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 781 bytes
embedded_file_obj0010.bin
45c6313a70c534019cc5824825e927269c8e9e5955559ca35419268e1686932d		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4BA 81 bytes
embedded_file_obj0011.bin
db96a3ec600ad8196d1d8ebb43448ac254d1c3edac6aedf03ea05ddb297e7f5e		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x556 13848 bytes
embedded_file_obj0012.bin
103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x3BB9 323 bytes
embedded_file_obj0014.bin
9342db065cdcaf52cc1c03a167a9ee6da4adf7b601ac8728eb048874abd6ddf7		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x3D46 161 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0015.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x3E2D 77 bytes
embedded_file_obj0016.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x3EC1 68 bytes

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