Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a69d48f8b22711…

MALICIOUS

PDF

11.1 KB Created: 2015-07-16 22:08:14 +04:00 Authoring application: DOMPDF
MD5: 0cd6020bfa9d87cd32c03373054bdc35 SHA-1: 7353e9fbc7cb225e3a3c007faf7e0e9d4f46ed76 SHA-256: 15a69d48f8b227111a83660e71a2742fd40bfa88268061b22feb0320266b5c30
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external websites. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of outbound links suggests a coordinated effort to redirect users, potentially to phishing sites or for SEO spam, which is a common tactic for malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9317

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=2056.2&tpnxb=2&pdf=2056
    • http://aksoynet.nl/index.php?article=320.2&cwiie=2&pdf=320
    • http://hillcrestchurch.info/index.php?article=530.2&wlywp=2&pdf=530
    • http://photo-file.ru/index.php?article=2063.2&tpnxb=2&pdf=2063
    • http://stylereaction.com/index.php?article=858.2&dspgi=2&pdf=858
    • http://photo-file.ru/index.php?article=539.2&tpnxb=2&pdf=539
    • http://aslanasansorleri.com.tr/index.php?article=1860.1&urrqb=1&pdf=1860
    • http://www.pieuvre-electrique-toulousaine.fr/index.php?article=1793.2&exokt=2&pdf=1793
    • http://bmwt.pt/index.php?article=1012.2&qvacx=2&pdf=1012
    • http://photo-file.ru/index.php?article=1510.2&tpnxb=2&pdf=1510
    • http://photo-file.ru/index.php?article=68.2&tpnxb=2&pdf=68
    • http://photo-file.ru/index.php?article=1238.2&tpnxb=2&pdf=1238
    • http://www.mantrabeautybar.ca/index.php?article=109.1&rukbv=1&pdf=109
    • http://photo-file.ru/index.php?article=227.2&tpnxb=2&pdf=227
    • http://kredite-fuer-arbeitslose.net/index.php?article=1536.2&ctfns=2&pdf=1536
    • http://photo-file.ru/index.php?article=2419.2&tpnxb=2&pdf=2419
    • http://gonencelik.com.tr/index.php?article=850.2&irydb=2&pdf=850

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