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<h1 id="rtfobj">rtfobj</h1>
<p>rtfobj is a Python module to detect and extract embedded objects
stored in RTF files, such as OLE objects. It can also detect OLE Package
objects, and extract the embedded files.</p>
<p>Since v0.50, rtfobj contains a custom RTF parser that has been
designed to match MS Word’s behaviour, in order to handle obfuscated RTF
files. See my article <a
href="http://decalage.info/rtf_tricks">“Anti-Analysis Tricks in
Weaponized RTF”</a> for some concrete examples.</p>
<p>rtfobj can be used as a Python library or a command-line tool.</p>
<p>It is part of the <a
href="http://www.decalage.info/python/oletools">python-oletools</a>
package.</p>
<h2 id="usage">Usage</h2>
<pre class="text"><code>rtfobj [options] <filename> [filename2 ...]
Options:
-h, --help show this help message and exit
-r find files recursively in subdirectories.
-z ZIP_PASSWORD, --zip=ZIP_PASSWORD
if the file is a zip archive, open first file from it,
using the provided password (requires Python 2.6+)
-f ZIP_FNAME, --zipfname=ZIP_FNAME
if the file is a zip archive, file(s) to be opened
within the zip. Wildcards * and ? are supported.
(default:*)
-l LOGLEVEL, --loglevel=LOGLEVEL
logging level debug/info/warning/error/critical
(default=warning)
-s SAVE_OBJECT, --save=SAVE_OBJECT
Save the object corresponding to the provided number
to a file, for example "-s 2". Use "-s all" to save
all objects at once.
-d OUTPUT_DIR use specified directory to save output files.</code></pre>
<p>rtfobj displays a list of the OLE and Package objects that have been
detected, with their attributes such as class and filename.</p>
<p>When an OLE Package object contains an executable file or script, it
is highlighted as such. For example:</p>
<p><img src="rtfobj1.png" /></p>
<p>To extract an object or file, use the option -s followed by the
object number as shown in the table.</p>
<p>Example:</p>
<pre class="text"><code>rtfobj -s 0</code></pre>
<p>It extracts and decodes the corresponding object, and saves it as a
file named “object_xxxx.bin”, xxxx being the location of the object in
the RTF file.</p>
<h2 id="how-to-use-rtfobj-in-python-applications">How to use rtfobj in
Python applications</h2>
<p>As of v0.50, the API has changed significantly and it is not final
yet. For now, see the class RtfObjectParser in the code.</p>
<h3 id="deprecated-api-still-functional">Deprecated API (still
functional):</h3>
<p>rtf_iter_objects(filename) is an iterator which yields a tuple
(index, orig_len, object) providing the index of each hexadecimal stream
in the RTF file, and the corresponding decoded object.</p>
<p>Example:</p>
<div class="sourceCode" id="cb3"><pre
class="sourceCode python"><code class="sourceCode python"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> oletools <span class="im">import</span> rtfobj</span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="cf">for</span> index, orig_len, data <span class="kw">in</span> rtfobj.rtf_iter_objects(<span class="st">"myfile.rtf"</span>):</span>
<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">'found object size </span><span class="sc">%d</span><span class="st"> at index </span><span class="sc">%08X</span><span class="st">'</span> <span class="op">%</span> (<span class="bu">len</span>(data), index))</span></code></pre></div>
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