Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d09781021623343…

MALICIOUS

PDF

11.5 KB Created: 2015-07-14 19:50:41 +03:00 Authoring application: DOMPDF
MD5: c2beee75317198dcaf5d8522f9f51381 SHA-1: 46dc4f1a5d08e18aee2619d64dd98296dd321810 SHA-256: 4d09781021623343f372f18277531836783243e3ed369d2d23f01e02593dbdaf
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to various external websites. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample, and the document body was heavily obfuscated and truncated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9282

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=527.1&vhbyw=1&pdf=527
    • http://c-retro.com/index.php?article=374.5&epuyx=5&pdf=374
    • http://danielemil.dk/index.php?article=2342.1&autbf=1&pdf=2342
    • http://www.cmpartners.com.au/index.php?article=1199.1&vhbyw=1&pdf=1199
    • http://transferpapir.no/index.php?article=538.2&lqebo=2&pdf=538
    • http://www.cmpartners.com.au/index.php?article=1407.1&vhbyw=1&pdf=1407
    • http://woohooyeah.com/index.php?article=505.2&vvygb=2&pdf=505
    • http://spicy-elephant.com/index.php?article=2336.2&douzq=2&pdf=2336
    • http://www.tamayouz.net/index.php?article=691.1&vexwv=1&pdf=691
    • http://www.cmpartners.com.au/index.php?article=1142.1&vhbyw=1&pdf=1142
    • http://www.cmpartners.com.au/index.php?article=85.1&vhbyw=1&pdf=85
    • http://www.cmpartners.com.au/index.php?article=313.1&vhbyw=1&pdf=313
    • http://deluxe.mallorca-property.biz/index.php?article=1495.2&ivxei=2&pdf=1495
    • http://www.cmpartners.com.au/index.php?article=168.1&vhbyw=1&pdf=168
    • http://www.bordelly.com/index.php?article=1847.2&sxtox=2&pdf=1847
    • http://www.cmpartners.com.au/index.php?article=375.1&vhbyw=1&pdf=375
    • http://mystatecrowdfunding.com/index.php?article=2070.1&rjtke=1&pdf=2070

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