Malicious PDF — malware analysis report

Static analysis result for SHA-256 5216457b47be6666…

MALICIOUS

PDF

11.3 KB Created: 2015-07-16 23:49:20 +04:00 Authoring application: DOMPDF
MD5: 49bd439947d8f7a81c5a275b787f49bf SHA-1: e728a57d25bf341f5b8ea55597ec5aed2c027fe5 SHA-256: 5216457b47be6666bed458f4fa7d48df482bb57af82820ce293fcff22e25f4f9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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 potential SEO manipulation or content hosting scheme. The document body itself is heavily obfuscated and contains many of these links, suggesting a lure to external malicious sites. No scripts were extracted, limiting further analysis of specific behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9383

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://chavagnes.com/index.php?article=2311.3&pvfgd=3&pdf=2311
    • http://thieux.fr/index.php?article=2266.2&cicvy=2&pdf=2266
    • http://www.mantrabeautybar.ca/index.php?article=1132.2&chffj=2&pdf=1132
    • http://chavagnes.com/index.php?article=2043.3&pvfgd=3&pdf=2043
    • http://bmwt.pt/index.php?article=84.3&lllvk=3&pdf=84
    • http://chavagnes.com/index.php?article=1978.3&pvfgd=3&pdf=1978
    • http://dryund.ca/index.php?article=381.1&hifho=1&pdf=381
    • http://gradespay.com/index.php?article=2416.1&cibeh=1&pdf=2416
    • http://synerte.eu/index.php?article=1648.1&gwbut=1&pdf=1648
    • http://chavagnes.com/index.php?article=797.3&pvfgd=3&pdf=797
    • http://chavagnes.com/index.php?article=1766.3&pvfgd=3&pdf=1766
    • http://chavagnes.com/index.php?article=2365.3&pvfgd=3&pdf=2365
    • http://www.myrlimo.com/index.php?article=930.2&lyktj=2&pdf=930
    • http://chavagnes.com/index.php?article=2127.3&pvfgd=3&pdf=2127
    • http://motorsportroden.nl/index.php?article=48.3&athzp=3&pdf=48
    • http://chavagnes.com/index.php?article=1648.3&pvfgd=3&pdf=1648
    • http://hillcrestchurch.info/index.php?article=317.1&jhrre=1&pdf=317

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