Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9e8df3ab3f2468…

MALICIOUS

PDF

11.9 KB Created: 2015-07-16 22:08:38 +04:00 Authoring application: DOMPDF
MD5: 2781169c34c8502723b2b502d308bee3 SHA-1: c50e706eb6904ae9473a8f4aa27982b679fbb86c SHA-256: 7b9e8df3ab3f2468ea295baea59522b2430f5237b8f0cc0869540be49e05c09a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by an ML classifier and contains a large number of embedded external links, consistent with SEO spam or link farming tactics. The document body is heavily obfuscated and contains no readable text, preventing further analysis of its specific 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://photo-file.ru/index.php?article=1066.2&tpnxb=2&pdf=1066
    • http://www.mantrabeautybar.ca/index.php?article=283.2&chffj=2&pdf=283
    • http://domedesigner.com/index.php?article=338.1&urgni=1&pdf=338
    • http://photo-file.ru/index.php?article=926.2&tpnxb=2&pdf=926
    • http://alears.lv/index.php?article=1789.3&seuis=3&pdf=1789
    • http://photo-file.ru/index.php?article=850.2&tpnxb=2&pdf=850
    • http://pleasereadbible.com/index.php?article=1637.2&htyht=2&pdf=1637
    • http://149clean.com/index.php?article=2014.3&happq=3&pdf=2014
    • http://www.wallart.com.es/index.php?article=135.1&dxunj=1&pdf=135
    • http://photo-file.ru/index.php?article=2214.2&tpnxb=2&pdf=2214
    • http://photo-file.ru/index.php?article=1154.2&tpnxb=2&pdf=1154
    • http://photo-file.ru/index.php?article=1318.2&tpnxb=2&pdf=1318
    • http://theawfulsteamboat.com/index.php?article=2085.1&tzsvh=1&pdf=2085
    • http://photo-file.ru/index.php?article=367.2&tpnxb=2&pdf=367
    • http://xserve-online.de/index.php?article=1825.1&yucuw=1&pdf=1825
    • http://photo-file.ru/index.php?article=1732.2&tpnxb=2&pdf=1732
    • http://unibindsport.no/index.php?article=203.2&nxcho=2&pdf=203

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