Malicious PDF — malware analysis report

Static analysis result for SHA-256 0251e9e3d2c5678b…

MALICIOUS

PDF

16.0 KB Created: 2020-10-12 00:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53686076e709228d0489939e74cee35f SHA-1: c936f5a6cd001ee0440bfec9bae2d294f07e94eb SHA-256: 0251e9e3d2c5678b50f7f3b52e9b6b390fb890c2f9387943409c5ea360ee2a30
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to direct users to malicious infrastructure. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector strongly suggests an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 https://ggtraff.ru/strik?keyword=emigrate+vs+immigrate+worksheet
    • http://files.homeworshipping.com/uploads/1/3/2/6/132681664/gepegom_zodinifirenu_ridax_bozoxewerex.pdf
    • http://nililimu.kaysfitcafe.com/uploads/1/3/1/6/131637419/popunizima.pdf
    • http://jeruzi.kiefykez.com/uploads/1/3/2/6/132680856/4b4103143.pdf
    • http://files.matzroofing.com/uploads/1/3/2/6/132682623/921bc18efbd.pdf
    • http://files.ccrpmi.com/uploads/1/3/1/3/131383657/a67c2bada4.pdf
    • https://site-1042554.mozfiles.com/files/1042554/16947837805.pdf
    • https://site-1044016.mozfiles.com/files/1044016/59826054034.pdf
    • https://site-1038700.mozfiles.com/files/1038700/nakijufusovus.pdf
    • http://files.balnarringsusfair.com.au/uploads/1/3/0/7/130775143/c0923.pdf
    • http://files.ayrarcheryclub.org/uploads/1/3/0/7/130776130/nesenakuletaju.pdf
    • https://cdn.shopify.com/s/files/1/0483/9951/5816/files/boxavowigozosigarotifelej.pdf
    • https://cdn.shopify.com/s/files/1/0494/2217/2327/files/birch_or_aspen_branches.pdf
    • https://cdn.shopify.com/s/files/1/0483/0373/4947/files/nolavamejiribexezuxur.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/combat_tournament_unblocked_weebly.pdf

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