Malicious PDF — malware analysis report

Static analysis result for SHA-256 89badc4b3aadf082…

MALICIOUS

PDF

11.9 KB Created: 2015-07-16 17:45:51 +03:00 Authoring application: DOMPDF
MD5: f1351f8d61ad525caebff7b6de4672fd SHA-1: 7a504fe2db8f22962cf04f477fd7342e24cb2910 SHA-256: 89badc4b3aadf08295cd24a26e528724059a8e2e1a30e8a18b0e224a1cbdecd1
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious websites. The document body is heavily obfuscated and contains no clear textual lure. No scripts were extracted from this sample.

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://www.cmpartners.com.au/index.php?article=2175.2&zrgdu=2&pdf=2175
    • http://www.adigtive.com/index.php?article=389.1&efzow=1&pdf=389
    • http://objetivofluir.com/index.php?article=2335.2&exoaz=2&pdf=2335
    • http://www.cmpartners.com.au/index.php?article=755.2&zrgdu=2&pdf=755
    • http://ledvisiom.com/index.php?article=180.7&biway=7&pdf=180
    • http://www.cmpartners.com.au/index.php?article=1403.2&zrgdu=2&pdf=1403
    • http://www.barbararaphael.com/index.php?article=2316.2&fkuvh=2&pdf=2316
    • http://www.erturturizm.com.tr/index.php?article=806.1&gnrew=1&pdf=806
    • http://www.fedorowska.pl/index.php?article=667.2&dndpe=2&pdf=667
    • http://www.cmpartners.com.au/index.php?article=1132.2&zrgdu=2&pdf=1132
    • http://www.cmpartners.com.au/index.php?article=1952.2&zrgdu=2&pdf=1952
    • http://www.cmpartners.com.au/index.php?article=2289.2&zrgdu=2&pdf=2289
    • http://www.pideal.ca/index.php?article=633.1&yxrdo=1&pdf=633
    • http://www.cmpartners.com.au/index.php?article=1603.2&zrgdu=2&pdf=1603
    • http://www.cordill.net/index.php?article=2450.3&kexkx=3&pdf=2450
    • http://www.cmpartners.com.au/index.php?article=224.2&zrgdu=2&pdf=224
    • http://eliotlovell.me/index.php?article=215.1&ybtwo=1&pdf=215

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