Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc53943588f7602…

MALICIOUS

PDF

1.14 MB Created: 2010-05-12 04:15:52 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: 82f332db2111c54a9da77ebcb30315f4 SHA-1: b08a56bd13641e103695e21dd67245a98fd1ca98 SHA-256: dbc53943588f7602554fc1796a4af567bbd025f5726e5db73fc703e748d63ad9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits high-confidence heuristic firings for PDF_EVAL and PDF_UNESCAPE, indicating the presence of obfuscated JavaScript. An embedded script payload was also detected. These factors strongly suggest the document is designed to exploit vulnerabilities within the PDF reader to execute malicious code. The script likely attempts to download and execute a secondary payload from a remote source, although the specific URL or execution method could not be fully reconstructed due to obfuscation.

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
8d29d9892152e4dae0a2350a6cb62050b6bc615fd5c7cf821597f0576445e2f5		 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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