PDF malware analysis — malicious · f186bc2ea5dbef6b

MALICIOUS

PDF

242.5 KB Created: 2011-12-27 18:54:41 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: 9dcb07a9dcc5b495b8b95c98aa8a8209 SHA-1: 239a9f18790ce354e770ce0c6f96735ff27f844f SHA-256: f186bc2ea5dbef6b7b6566e362250ce8c650863443c2bd640f2a918bf3b81a2f

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The ML classifier also flagged the file as malicious with high confidence. While the embedded URL was marked as benign, the presence of executable script within the PDF strongly suggests an attempt to execute malicious code. The script's exact function is unclear due to obfuscation, but it is likely designed to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9691

Heuristics 4

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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://it.ph.affinity.com/ctrack0.php?&cmpubid=xvj35&cmskps=&cmsite=www.gujaal.com&cmchannelid=&cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&cmoe=yahoo&cmoq=tamilnadu%20live%20news%20aiadmk&cmvd=1600900-3301361&cmvc=null&cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&rnd=1305270576026&q=result&at=XS&cmip=17&cmis=149&cmid=6&cmdt=p
- http://it.ph.affinity.com/ctrack0.php?&cmpubid=xvj35&cmskps=&cmsite=www.gujaal.com&cmchannelid=&cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&cmoe=yahoo&cmoq=tamilnadu%20live%20news%20aiadmk&cmvd=1600900-3301361&cmvc=null&cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&rnd=1305270576026&q=government&at=XS&cmip=17&cmis=149&cmid=6&cmdt=p
- http://it.ph.affinity.com/ctrack0.php?&cmpubid=xvj35&cmskps=&cmsite=www.gujaal.com&cmchannelid=&cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&cmoe=yahoo&cmoq=tamilnadu%20live%20news%20aiadmk&cmvd=1600900-3301361&cmvc=null&cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&rnd=1305270576026&q=bargain&at=XS&cmip=17&cmis=149&cmid=6&cmdt=p
- http://it.ph.affinity.com/ctrack0.php?&cmpubid=xvj35&cmskps=&cmsite=www.gujaal.com&cmchannelid=&cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&cmoe=yahoo&cmoq=tamilnadu%20live%20news%20aiadmk&cmvd=1600900-3301361&cmvc=null&cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&rnd=1305270576026&q=data%20entry&at=XS&cmip=17&cmis=149&cmid=6&cmdt=p
- http://it.ph.affinity.com/ctrack0.php?&cmpubid=xvj35&cmskps=&cmsite=www.gujaal.com&cmchannelid=&cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&cmoe=yahoo&cmoq=tamilnadu%20live%20news%20aiadmk&cmvd=1600900-3301361&cmvc=null&cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&rnd=1305270576026&q=home&at=XS&cmip=17&cmis=149&cmid=6&cmdt=p
- http://it.ph.affinity.com/ctrack0.php?&cmpubid=xvj35&cmskps=&cmsite=www.gujaal.com&cmchannelid=&cmurl=http%3A%2F%2Fwww.gujaal.com%2F296%2Ftamilnadu-election-results-2011-updates-tn-election-results-live&cmref=http%3A%2F%2Fsearch.yahoo.com%2Fsearch%3Fp%3Dtamilnadu%2Blive%2Bnews%2Baiadmk%26ei%3DUTF-8%26fr%3Dmoz35&cmoe=yahoo&cmoq=tamilnadu%20live%20news%20aiadmk&cmvd=1600900-3301361&cmvc=null&cmtitle=Tamilnadu%20Election%20Results%202011%20%7C%20Updates%20TN%20Election%20Results%20Live%20%7C%20Gujaal%20News&rnd=1305270576026&q=candidate&at=XS&cmip=17&cmis=149&cmid=6&cmdt=p

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000d477.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xD477	264072 bytes
`embedded_pdf_script_0003c637.bin` `0f6a5ba2a6d8bd1dacb73c62bc7d363ce4ff74153674cc6eac7237737c530608`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x3C637	248262 bytes

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