Malicious PDF — malware analysis report

Static analysis result for SHA-256 945a9609b789aad5…

MALICIOUS

PDF

1.14 MB Created: 2010-05-18 02:50:51 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: 0594d7131d3c23b77dbe469525936a38 SHA-1: e47e5d63b809a6cfc891b23fcbd4c01378a26b7b SHA-256: 945a9609b789aad57fe5f009d6ae27b9dd331b25b5439f87f280da1bd22b2c11
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains heuristics indicating embedded script payloads and the use of JavaScript functions like eval() and unescape(), suggesting an attempt to execute malicious code. The embedded script, though obfuscated, is likely designed to download and execute a secondary payload. The presence of the URL http://www.iec.ch in the document body, while marked as benign, is the only external reference found.

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
90eb3f9de3d76a05f5d794fbfee4caf28b67f55e3e1f544a6fb2e9ca5272eb09		 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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