Malicious PDF — malware analysis report

Static analysis result for SHA-256 95690186613aad4a…

MALICIOUS

PDF

67.1 KB Created: 2021-06-21 14:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5a8f49f396ba2918ae940f2f86f97ae8 SHA-1: 30ea444aa60b6c46bca7241caac4b9b51ec3a26a SHA-256: 95690186613aad4a9bd985731b95bf76e0e29141754f9f8b774b6552f664c086
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the link farm structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9578

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/93b6ba8f5551eb612a85cc6d13f65212/gobikal.pdf In PDF document text
    • https://armagedonspedycja.pl/files/file/gazanogetovijurudonijano.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/55012925707.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/e47522a04a8244b85c0b237086228422/82043820966.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09ee6bbb19---nirunixizojigetagi.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/37250551890.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/ce5079ef04e279b3338427582aa94c4b/nisudajuvopolekukole.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/wirupamuxez.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/witamarugazejemor.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/54j965rf4og9qshojp458sjd7i/setokezexujaselutosizuveb.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/javuxad.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee3e336101---jozubi.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/nufufugoxegekagexofarelu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbc747ec5---68231626106.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/1a1922bb7cb26198203ec27db2ab4192/bifulisowoded.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/eropsvv38e79m22edo6ij7gah0/72499576701.pdfIn PDF document text
    • http://chuyennhakienvangvn.net/upload/files/danilut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=scalar+and+vector+potentialPDF link annotation

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