Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d94a8ed0a59dd9…

MALICIOUS

PDF

11.9 KB Created: 2015-07-15 14:36:16 +04:00 Authoring application: DOMPDF
MD5: 841ccb4f8571dc97b3ee041ff48c7590 SHA-1: 1d2aa503bc8b6bf3050aa4581c3eefdb7f4aa7ab SHA-256: 66d94a8ed0a59dd9dd66be266a5b073ec009d00cdb89a7ba12ebff2275563fc2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to various external websites, identified by the PDF_SEO_LINK_FARM heuristic. While no scripts were extracted, the ML classifier flagged the document as malicious. The embedded URLs are likely used to redirect users to potentially malicious sites or for SEO spam purposes. The document body contains garbled text and some URLs, suggesting it is not intended for legitimate user interaction.

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=642.1&wehsa=1&pdf=642
    • http://harmenhomes.ca/index.php?article=2436.1&wcdhp=1&pdf=2436
    • http://top-rice-cooker.com/index.php?article=44.1&ratfe=1&pdf=44
    • http://photo-file.ru/index.php?article=550.1&wehsa=1&pdf=550
    • http://www.lifedreams.es/index.php?article=1614.1&isbrk=1&pdf=1614
    • http://photo-file.ru/index.php?article=2107.1&wehsa=1&pdf=2107
    • http://www.mantrabeautybar.ca/index.php?article=1222.1&rukbv=1&pdf=1222
    • http://www.kingdomfaithchurch.org/index.php?article=1786.1&fksac=1&pdf=1786
    • http://morlockfamily.pl/index.php?article=38.5&qpowq=5&pdf=38
    • http://photo-file.ru/index.php?article=1477.1&wehsa=1&pdf=1477
    • http://photo-file.ru/index.php?article=1894.1&wehsa=1&pdf=1894
    • http://photo-file.ru/index.php?article=2151.1&wehsa=1&pdf=2151
    • http://camus-sarl.fr/index.php?article=1287.2&fnxpz=2&pdf=1287
    • http://photo-file.ru/index.php?article=944.1&wehsa=1&pdf=944
    • http://www.authenticness.com/index.php?article=2402.1&aqdto=1&pdf=2402
    • http://photo-file.ru/index.php?article=2110.1&wehsa=1&pdf=2110
    • http://msobo.fr/index.php?article=803.2&dfkro=2&pdf=803

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