Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c942ab6cc885bb…

MALICIOUS

PDF

66.5 KB Created: 2021-10-05 05:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9e7f1070bf6f24a6f92f4f60cf7dd749 SHA-1: f7aa26097ed8d3db6c6632ffc29b285f063dd846 SHA-256: e7c942ab6cc885bbbf7f271ed08d85cd7f8622700d14b50e2b840ec806944816
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm, with many URLs pointing to potentially compromised websites. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojan distribution intent. The embedded JavaScript likely facilitates the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2704

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/zonoben.pdf In PDF document text
    • http://goldmustang.com/files/files/76436163212.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/sotomeri.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161413d0954928---77356123938.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/depinijediza.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/28025040142.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/vajetejuj.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/dobatofofaxarak.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/5076961027.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/20098229260.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/56537114405.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/juwipikinawikenelojizolos.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/57423681721.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/bivugisisoj.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1615ba3a25447c---jimuxidiku.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/gotosinibetokow.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/6b13479c6517d89a56607de9b170ed15/52387512990.pdfIn PDF document text
    • http://orenprom.com/img/account/file/fejakibolilunotawufa.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/27450435915.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/45183241896.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/32578735762.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/6267423781.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/saxitu.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/55439773692.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/luzawatazubitojogavo.pdfIn PDF document text
    • http://tid.vn/upload/files/49492778616.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=eigenvector+centrality+weighted+networkPDF link annotation

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