Malicious PDF — malware analysis report

Static analysis result for SHA-256 84df814e47bc7e83…

MALICIOUS

PDF

69.3 KB Created: 2021-08-07 05:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 48878f759061c76fd11c0dc154076099 SHA-1: 45ac95129b80b4d8ee20d26dad991251d4b4a994 SHA-256: 84df814e47bc7e83741e4e077c1af7a8f454cc8f81690b85460dff89d7665543
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 functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. The presence of numerous links and the use of compromised hosting suggest an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://newsru.md/upload/userfiles/files/13425376777.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d631b090f3---lepinikafabunolikutazax.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160908f7d68dae---56644105996.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/fawuzejabizepedewapelag.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0ed49f104---20268685605.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3ae798310---2853601242.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/eeba80410f6f5603ecb6443ec006d5c3/22248914822.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4fecdf055---jidekos.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16082ffd180107---28242760745.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/famesim.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/26105343797.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/zajewowakane.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/gocvg2jtp5ucdvg29dis93dcl2/37001474448.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/2321722138.pdfIn PDF document text
    • http://metallpress.ru/files/divavafamenigiwivolowe.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/zawexutunarenakisoli.pdfIn PDF document text
    • http://benrassam.com/uploads/files/moregumupipi.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e402071cc90---zederovago.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/12454208067.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/guvunevufiwonenifimev.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fdf1b17bb---48630783244.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5936e710a1---33594342026.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/90716114169.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/9a0f7afp8o6ni3p1jsvk4acrl3/zetebura.pdfIn PDF document text
    • http://sjhtractor.com/d/files/doririle.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=comunista+socialista+significadoPDF link annotation

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