Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb74dd86a5d95cf…

MALICIOUS

PDF

11.9 KB Created: 2015-07-15 14:37:46 +04:00 Authoring application: DOMPDF
MD5: 79401afd6736d4171e43e67234bb8b52 SHA-1: 607a2d82480b309ea5111292eadff571748e551f SHA-256: 5cb74dd86a5d95cf21953bd3832da9c30e620051b81b0ac119b894e4dbe275db
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified as a link farm. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to redirect users to potentially malicious websites, possibly for SEO manipulation or to serve further payloads.

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=846.1&wehsa=1&pdf=846
    • http://escale-bien-etre-37.com/index.php?article=657.2&nalxy=2&pdf=657
    • http://logimarket.com.tr/index.php?article=762.1&ewcgf=1&pdf=762
    • http://photo-file.ru/index.php?article=1233.1&wehsa=1&pdf=1233
    • http://razan.com.ua/index.php?article=1604.1&vafyr=1&pdf=1604
    • http://photo-file.ru/index.php?article=2146.1&wehsa=1&pdf=2146
    • http://larasstore.com/index.php?article=2448.2&qcpsq=2&pdf=2448
    • http://synerte.eu/index.php?article=590.1&gwbut=1&pdf=590
    • http://www.mantrabeautybar.ca/index.php?article=1827.1&rukbv=1&pdf=1827
    • http://photo-file.ru/index.php?article=1249.1&wehsa=1&pdf=1249
    • http://photo-file.ru/index.php?article=343.1&wehsa=1&pdf=343
    • http://photo-file.ru/index.php?article=306.1&wehsa=1&pdf=306
    • http://camus-sarl.fr/index.php?article=189.2&fnxpz=2&pdf=189
    • http://photo-file.ru/index.php?article=1952.1&wehsa=1&pdf=1952
    • http://149clean.com/index.php?article=362.2&lkxaf=2&pdf=362
    • http://photo-file.ru/index.php?article=545.1&wehsa=1&pdf=545
    • http://massiv-holz-moebel.de/index.php?article=720.1&onxqu=1&pdf=720

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