Malicious PDF — malware analysis report

Static analysis result for SHA-256 8855bbcdada94084…

MALICIOUS

PDF

11.6 KB Created: 2015-07-15 14:42:02 +04:00 Authoring application: DOMPDF
MD5: 535ceacb3917883ee976322c3ca52c47 SHA-1: d2b134457ac0a6b6df0fcec101eacb4a60f52224 SHA-256: 8855bbcdada9408417ac81a8a1a26aab2bc92aa3a3b9a5fde542ebfd9ce44000
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which suggests a link farm or SEO manipulation tactic. The document body, while containing some seemingly legitimate text about binary options, also repeats these URLs, reinforcing the idea that the primary purpose is to drive traffic to these external sites. The ML classifier also flagged this PDF as malicious with high confidence.

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=450.1&wehsa=1&pdf=450
    • http://fresh2death.com/index.php?article=1104.1&lzrlo=1&pdf=1104
    • http://www.lole.cl/index.php?article=2060.1&fadfz=1&pdf=2060
    • http://photo-file.ru/index.php?article=198.1&wehsa=1&pdf=198
    • http://www.mantrabeautybar.ca/index.php?article=624.1&rukbv=1&pdf=624
    • http://photo-file.ru/index.php?article=4.1&wehsa=1&pdf=4
    • http://madejalook.com/index.php?article=945.1&ynlkg=1&pdf=945
    • http://www.myrlimo.com/index.php?article=1568.1&sqfkb=1&pdf=1568
    • http://escale-bien-etre-37.com/index.php?article=1948.2&nalxy=2&pdf=1948
    • http://photo-file.ru/index.php?article=1473.1&wehsa=1&pdf=1473
    • http://photo-file.ru/index.php?article=1605.1&wehsa=1&pdf=1605
    • http://photo-file.ru/index.php?article=2468.1&wehsa=1&pdf=2468
    • http://alears.lv/index.php?article=1072.2&cqwcy=2&pdf=1072
    • http://photo-file.ru/index.php?article=2177.1&wehsa=1&pdf=2177
    • http://kameraturva.net/index.php?article=1370.4&ghbga=4&pdf=1370
    • http://photo-file.ru/index.php?article=369.1&wehsa=1&pdf=369
    • http://www.fabulaeventos.com.br/index.php?article=1988.1&ipwdu=1&pdf=1988

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