Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c23fc6de90d3c7…

MALICIOUS

PDF

127.8 KB Created: 2021-08-18 02:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36fd64fdd59c83c90daf69e612a5b6f4 SHA-1: 1fab8ee1e322461878c770993411fa87bcd9e498 SHA-256: 34c23fc6de90d3c7a447288a328e544fd70754345edfe02013d063f698058753
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the structure and embedded URLs suggest a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7849

Heuristics 4

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/repilibivezi.pdf
    • http://beloezoloto.ru/userfiles/file/xeluzubijaviturapuxado.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0428c7742932bad4a1e3fe9463f76cd1/norafotipo.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/de1e49006fba93be4fd353cfa6842a35/66132221044.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160713c61a2940---80764193282.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084208914dec---15754101450.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609d33bd10c37---60127457114.pdf
    • http://bigandtallking.com/userfiles/file/bonufazapebitizumoxiwuwer.pdf
    • https://banderlogclub.ru/Files/file/57608667407.pdf
    • https://pnp-studio.com/fckeditorfiles/file/86511138890.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3bf41b4da320c050c90f6272412ccb69/77079825753.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7818c477d---basuzadifexuvino.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0abc81de87---fuzesowedo.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/55261553867.pdf
    • http://risorsaterra.it/userfiles/files/51981412211.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/84b3e67542b5e22d263df2ef67e2a6e8/17432451696.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/dad1a9a2a4d08beb4eedecc141ac5a9f/wezekabotofinetek.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd1a7a3a63---bogalilu.pdf
    • http://vet-arrighicol
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=geo+joke+worksheets+2002+nasco+answers

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