Malicious PDF — malware analysis report

Static analysis result for SHA-256 1988a1f49eeaed22…

MALICIOUS

PDF

11.8 KB Created: 2015-07-15 14:41:53 +04:00 Authoring application: DOMPDF
MD5: 2446b3f50aaa912cb36de71c160a3578 SHA-1: 3c3219a8909786960d55d4461830c16fc4b626aa SHA-256: 1988a1f49eeaed22aab9d8752e518b270c4083c04fa3c09ce98dce1384389f2d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to various websites, many of which appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of external links generated for SEO purposes. The ML classifier also flagged the PDF as malicious. The embedded URLs likely serve as a redirection mechanism to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8959

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://photo-file.ru/index.php?article=1666.1&wehsa=1&pdf=1666
    • http://www.mantrabeautybar.ca/index.php?article=1845.1&rukbv=1&pdf=1845
    • http://synerte.eu/index.php?article=169.1&gwbut=1&pdf=169
    • http://photo-file.ru/index.php?article=1642.1&wehsa=1&pdf=1642
    • http://zamca.ro/index.php?article=277.1&jxoor=1&pdf=277
    • http://photo-file.ru/index.php?article=295.1&wehsa=1&pdf=295
    • http://aksoynet.nl/index.php?article=1574.2&cwiie=2&pdf=1574
    • http://sandystraitssizzlers.com/index.php?article=2441.1&kwbat=1&pdf=2441
    • http://marmoleraflores.com/index.php?article=970.2&qultr=2&pdf=970
    • http://photo-file.ru/index.php?article=2433.1&wehsa=1&pdf=2433
    • http://photo-file.ru/index.php?article=1171.1&wehsa=1&pdf=1171
    • http://photo-file.ru/index.php?article=2175.1&wehsa=1&pdf=2175
    • http://egliseviechretienne.com/index.php?article=921.5&fkyfd=5&pdf=921
    • http://photo-file.ru/index.php?article=420.1&wehsa=1&pdf=420
    • http://dfnotebooks.com.br/index.php?article=1790.1&gatis=1&pdf=1790
    • http://photo-file.ru/index.php?article=894.1&wehsa=1&pdf=894
    • http://escale-bien-etre-37.com/index.php?article=514.2&nalxy=2&pdf=514

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