Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d061e43cb1596df…

MALICIOUS

PDF

12.2 KB Created: 2015-07-16 22:06:33 +04:00 Authoring application: DOMPDF
MD5: f3c16be03cdc63506a79a491f0065efd SHA-1: 66babac3541ace09d808c4043a963d0d92e68f60 SHA-256: 3d061e43cb1596df1f96dfdc5534f822e7f0a418a3197e397d54a3e51b462847
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links, indicating a link farm or redirection scheme. The primary heuristic identified a "PDF_SEO_LINK_FARM" which suggests the document's purpose is to host numerous external links. No scripts were extracted from this sample, and the document body was heavily truncated, limiting further analysis of the specific lure. The embedded URLs are the most actionable indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8995

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=2372.2&tpnxb=2&pdf=2372
    • http://marche-espoir.org/index.php?article=1150.6&xonvf=6&pdf=1150
    • http://TomOn.tv/index.php?article=2081.1&oeyju=1&pdf=2081
    • http://photo-file.ru/index.php?article=1668.2&tpnxb=2&pdf=1668
    • http://ve-klubber.dk/index.php?article=1244.2&thjiq=2&pdf=1244
    • http://photo-file.ru/index.php?article=1974.2&tpnxb=2&pdf=1974
    • http://hotrodderclassifieds.com/index.php?article=612.1&hjjgr=1&pdf=612
    • http://gonencelik.com.tr/index.php?article=1188.2&irydb=2&pdf=1188
    • http://www.mantrabeautybar.ca/index.php?article=898.2&chffj=2&pdf=898
    • http://photo-file.ru/index.php?article=278.2&tpnxb=2&pdf=278
    • http://photo-file.ru/index.php?article=85.2&tpnxb=2&pdf=85
    • http://photo-file.ru/index.php?article=926.2&tpnxb=2&pdf=926
    • http://cocoonin.fr/index.php?article=103.1&ybtii=1&pdf=103
    • http://photo-file.ru/index.php?article=427.2&tpnxb=2&pdf=427
    • http://hillcrestchurch.info/index.php?article=1415.1&jhrre=1&pdf=1415
    • http://photo-file.ru/index.php?article=2396.2&tpnxb=2&pdf=2396
    • http://ve-klubber.dk/index.php?article=535.1&jzwgf=1&pdf=535

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