Malicious PDF — malware analysis report

Static analysis result for SHA-256 77df2592fe287b65…

MALICIOUS

PDF

242.5 KB Created: 2012-02-05 06:09:59 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: 98117e58a6d1fdd875fe384613f532bf SHA-1: 40c58327fa459dcf61b7b5f154795c003c8a7da9 SHA-256: 77df2592fe287b65252492c9f63746e5ef36de772544793e12fb938d1356a416
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains an embedded script that utilizes hidden iframes and external URIs. The script likely attempts to redirect the user to malicious websites, potentially for phishing or to download further malicious payloads. The ML classifier strongly indicated maliciousness, and the presence of embedded scripts and hidden iframes supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

Heuristics 4

  • PDF contains hidden external HTML iframe high PDF_HIDDEN_HTML_IFRAME
    PDF bytes contain a hidden zero-size HTML iframe pointing to an external HTTP(S) URL. This is a strong malicious dropper/redirect indicator and is not expected in ordinary PDF content.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.gujaal.com/296/tamilnadu-election-results-2011-updates-tn-election-results-li
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&amp;rnd=1305270576026&amp;q=result&amp;at=XS&amp;cmip=17&amp;cmis=149&amp;cmid=6&amp;cmdt=p
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&amp;rnd=1305270576026&amp;q=government&amp;at=XS&amp;cmip=17&amp;cmis=149&amp;cmid=6&amp;cmdt=p
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&amp;rnd=1305270576026&amp;q=bargain&amp;at=XS&amp;cmip=17&amp;cmis=149&amp;cmid=6&amp;cmdt=p
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&amp;rnd=1305270576026&amp;q=data%20entry&amp;at=XS&amp;cmip=17&amp;cmis=149&amp;cmid=6&amp;cmdt=p
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&amp;rnd=1305270576026&amp;q=home&amp;at=XS&amp;cmip=17&amp;cmis=149&amp;cmid=6&amp;cmdt=p
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&amp;rnd=1305270576026&amp;q=candidate&amp;at=XS&amp;cmip=17&amp;cmis=149&amp;cmid=6&amp;cmdt=p
    • http://it.ph.affinity.com/ctrack0.php?&amp;cmpubid=xvj35&amp;cmskps=&amp;cmsite=www.gujaal.com&amp;cmchannelid=&amp;cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&amp;cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&amp;cmoe=yahoo&amp;cmoq=tamilnadu%20live%20news%20aiadmk&amp;cmvd=1600900-3301361&amp;cmvc=null&amp;cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%2
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d477.bin
a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD477 264072 bytes
embedded_pdf_script_0003c637.bin
fb6535f612e74d6d1d4631bcf30151d22d4e51ac6a6cbef0550e574ed3aa481c		 pdf-embedded-script PDF decompressed stream script payload at offset 0x3C637 248262 bytes

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