Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c9ecbf7db3157c…

MALICIOUS

PDF

60.9 KB Created: 2021-06-25 00:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9081783b451e0ea5370509a33a501e64 SHA-1: b4a61314fb311934cd8ce486c3831fdec0e200fb SHA-256: 14c9ecbf7db3157c679d7825260c149f0fd36af482d9a20ba916414c69be252a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to what appear to be compromised WordPress upload directories. These links likely serve as a distribution mechanism for further malicious content, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8844

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://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16081ea0d2753a---86114868943.pdf In PDF document text
    • http://stlnsk.ru/uploads/file/bupejasefoniwiruluxu.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210603_0E47B6E4AB25D69A.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/wefevoraz.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/95461579944.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9944e5d7a9---46753474057.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebc77b5bf2---25514388242.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c35f8bf0c1c---zumugataroloxisewezoli.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/sebidometabureliju.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/018ca9d793a7e6f1784b50ee71db03f4/75316115997.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724b0b895ca---76312683094.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/27213619425.pdfIn PDF document text
    • http://tano-cable.com/d/files/vedoxedumetasuma.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609a0eb9c33f6---94267916379.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b87be96294a---tajujiki.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/mametibesadevisinibovekij.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823b7e5e89b---suzonopuladolonad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=kiranmala+2+serialPDF link annotation

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