Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d343cdc107186e5…

MALICIOUS

PDF

65.1 KB Created: 2021-08-21 03:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ebfdf4662adf9e896ed5fc7739a66181 SHA-1: 54223dce9091bad25d10d946ba7a5fca3f13ae28 SHA-256: 4d343cdc107186e59048833e5087a19967f59a766c2fb218bd13abc3674422eb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7548

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://smidgel.ru/uplcv?utm_term=catfish+and+mandala+chapter+summary PDF link annotation
    • http://ats-dz.com/userfiles/file/fiwekuf.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/nudupazudunuvinepamijuvon.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/tuzopetulefibujikigisefo.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f62d3795905---zemadubiji.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021071222310152.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/makodixenesikemewid.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/40234201680.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/81859032180.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/luvamu.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/bomimupudeluzofumemelogo.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160d35754966be---13582307614.pdfIn PDF document text
    • http://119pump.net/d/files/wunalufewepamozanenebupe.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc8df0b509---96801687036.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/bc3c218744e967296621848b8c99e6c6/xirag.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/vatusabomotege.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8944292da30d0eee1725176bbfd78c7a/ridapebipebozodivedimimej.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9c90b6759---pafobavefosidabopuposu.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8cbce26b21af22c736d15d8c8ae7a0af/90310131855.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/vutavalokobudamub.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/talegemuruxedufalifafojo.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609dade913d49---69811468566.pdfIn PDF document text

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