Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31ebb9987627854…

MALICIOUS

PDF

58.4 KB Created: 2021-07-21 19:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8050ab70980e09f43cfd77a869226c13 SHA-1: 804c24b94b986234e22c1d49544cbb55512c600d SHA-256: f31ebb9987627854daf0f3a104f9998a84f53f3be4e91d598c5db9910c94772c
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 embedded URLs that point to compromised CMS upload directories. These links likely serve as a lure to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/64849f2f07373515c903c34c8dfda641/95448056404.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/19287939205.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/61ca0ff0e6f9b227a1c5bd96af83bf5c/34647021127.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/ab3047a7d5f3164cb76611b3b6838a6d/50795233186.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/fijezegijojalos.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608688641568a---23679021919.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/22473700125.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/31377036574.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a8019d4450c929241b74bc086609dce9/sufulosunitoxosizamatofuf.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/9735d2e4c01adf1a24fea37a79e47fe0/pazanezukodasefetavone.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/a9137620d53037ffc941a1bbc397e78f/befebakabuwezeja.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210707214239.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6255a271b---nugalizuxa.pdfIn PDF document text
    • http://sparkpro.lv/content/file/duremulexisumuvujunuxibuf.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c88e3d44aceb70adc63a6822bd2fd226/49019296270.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/b5ab7c4df524ea3d58faad61293b1845/51909775273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=birthday+wishes+for+1+year+baby+boyPDF link annotation

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