Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2435eed438a04fe…

MALICIOUS

PDF

12.9 KB Created: 2015-07-15 16:26:40 +04:00 Authoring application: DOMPDF
MD5: 9deb775e3752f3158119419a29daecb2 SHA-1: 3ebe74fbd0be853840ee386d53b58bfe7d1e1960 SHA-256: a2435eed438a04fe9e816fd150b0c2d6707cb0621ad753b36b46ba11810d85fa
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and contains a large number of embedded URLs pointing to various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting the primary purpose is to direct users to external sites. The document body, though heavily obfuscated, contains some of these URLs, reinforcing the link farm strategy. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8856

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=395.2&urwbo=2&pdf=395
    • http://www.lole.cl/index.php?article=2054.1&fadfz=1&pdf=2054
    • http://www.protop.co.il/index.php?article=2412.1&nraga=1&pdf=2412
    • http://chavagnes.com/index.php?article=313.2&urwbo=2&pdf=313
    • http://power-team.cz/index.php?article=1414.3&uwbuc=3&pdf=1414
    • http://chavagnes.com/index.php?article=428.2&urwbo=2&pdf=428
    • http://www.masajesmexicali.com/index.php?article=187.1&pjtcs=1&pdf=187
    • http://heathervincentlandscapes.com.au/index.php?article=175.1&bsylx=1&pdf=175
    • http://kameraturva.net/index.php?article=96.4&ghbga=4&pdf=96
    • http://chavagnes.com/index.php?article=1176.2&urwbo=2&pdf=1176
    • http://chavagnes.com/index.php?article=1092.2&urwbo=2&pdf=1092
    • http://chavagnes.com/index.php?article=1321.2&urwbo=2&pdf=1321
    • http://www.mantrabeautybar.ca/index.php?article=1858.1&rukbv=1&pdf=1858
    • http://chavagnes.com/index.php?article=2427.2&urwbo=2&pdf=2427
    • http://fotosalon-zoom.ru/index.php?article=1241.4&sufyu=4&pdf=1241
    • http://chavagnes.com/index.php?article=2227.2&urwbo=2&pdf=2227
    • http://intelluride.co/index.php?article=1274.1&gdfls=1&pdf=1274

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