Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea077c6841b7f5b…

MALICIOUS

PDF

434.6 KB Created: 2013-03-28 10:15:18 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: f50ef5e04682f52421c11468aac27bcf SHA-1: d1bf8a268782e653e04b2c67cd1d072b4a2eb322 SHA-256: 8ea077c6841b7f5bb7372072825ab14d2801b15bc062755729042784a17c9352
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains heuristics indicating the presence of external URIs and a hidden HTML iframe, suggesting an attempt to redirect the user to malicious content. The embedded URLs, including http://www.neurologiapolska.pl/index_ptn.html, are likely part of this redirection chain. The ML classifier also flagged this PDF as malicious. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6407

Heuristics 3

  • 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.
  • 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.neurologiapolska.pl/index_ptn.html
    • http://www.dmkg.de/thera/tacsfinal.pdf
    • http://www.i-h-s.org/
    • http://www.seo.mavi1.org
    • http://www.escortbayanankara.info
    • http://www.ankaraescortbayan.info
    • http://www.sohbetsohbetx.com
    • http://www.mavideniz.gen.tr
    • http://www.siyamiozkan.org

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001727d.bin
33146807063f272b3497d80fa0da4bd0b69a143f444ff7d4f08e2242867b37e1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1727D 514280 bytes

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