Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb13c08004e79625…

MALICIOUS

PDF

1.14 MB Created: 2010-05-08 03:09:18 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: 219d4ed64640a0a22efe054fd570806d SHA-1: dda23b81069d3f8aa323692d8effc2ade425d1d4 SHA-256: fb13c08004e7962554ff3fc58c39f7b593ba36c2627ef38795825345e42bb98f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicating a likely attempt to obfuscate and execute malicious code. The presence of these functions and the embedded script payload strongly suggest the document is designed to exploit PDF vulnerabilities. The script's purpose is to download and execute a second-stage payload, though the exact nature of the payload cannot be determined from the available evidence.

Heuristics 5

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • 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.
  • 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/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://www.iec.ch

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000bf61.bin
a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBF61 264072 bytes
embedded_pdf_script_0012191b.bin
42cc598096cb329cc8635ddab5c09d20c5d4af9ad840512d3b5eb89e54c96e94		 pdf-embedded-script PDF decompressed stream script payload at offset 0x12191B 1192461 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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