Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cb5882a81e7df7…

MALICIOUS

PDF

7.0 KB Created: 2015-06-04 18:32:12 +04:00 Authoring application: DOMPDF First seen: 2015-06-09
MD5: bded30a525956147c82d33515fd5804d SHA-1: 47249998715b67a08b6d44c24fcf04ecd32296e7 SHA-256: 07cb5882a81e7df78832cd3612ecf4e8c7d132e606d96b322434b0aecf0948f7
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs that are part of a link farm, as indicated by the PDF_SEO_PHP_GATEWAY_LINK_FARM heuristic. The document body also contains these URLs and text related to options trading, suggesting a lure to external malicious sites. The ML classifier also flagged the PDF as malicious, increasing confidence in its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6631

Heuristics 2

  • PDF carries a PHP-gateway SEO-spam PDF link farm medium PDF_SEO_PHP_GATEWAY_LINK_FARM
    PDF contains four or more clickable links whose target is a `.php` gateway with a multi-word search-PHRASE document slug embedded after it (e.g. 'index.php?.../binary+options+trading+nz.pdf' or 'pdf.php/cialis-dosage-side-effects.pdf'). Legitimate PHP-served documents use a filename or numeric id, not a search-query phrase, so this is the generated SEO link-farm shape — pharma / binary-options / 'free download' spam that ranks for queries and routes users into payload/redirect chains. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.skillmadeiras.com.br/index.php?wiki/04/06/2015/crytix/u.s.+binary+options.pdf&pbqku=1&news=1642 In PDF document text
    • http://www.lowestmedicareplans.com/index.php?wiki/04/06/2015/marriage/binary+code+options.pdf&hjnjz=1&news=1118In PDF document text
    • http://www.etiket.es/index.php?wiki/04/06/2015/naturalcare/binary+options+japan+regulation.pdf&jzyti=1&news=42In PDF document text
    • http://nuhyatsanayi.com/index.php?wiki/04/06/2015/vidgamer/binaryoptionstradingsignals.com+scam.pdf&hktpv=1&news=1577In PDF document text
    • http://chasingfiber.com/index.php?wiki/04/06/2015/vaicomtudo/binary+brokers+canada.pdf&bjydv=1&news=1194In PDF document text
    • http://teamworkworks.org/index.php?wiki/04/06/2015/armstrongfeed/binary+options+trading+nz.pdf&pansy=1&news=2934In PDF document text
    • http://www.supermaraton.eu/index.php?wiki/04/06/2015/housepop/binaryoptionstradingguide.com.pdf&owutp=1&news=sitemapIn PDF document text

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