Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e60496fc5893226…

MALICIOUS

PDF

78.0 KB Created: 2021-09-01 06:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 28f5c913ddba657fecdd83fa4b052bee SHA-1: 27880cf88afd20ac780c46f3bb44074afe1b2925 SHA-256: 3e60496fc58932267ee2bc79cec448d41c90f535c499ed8261c1b279b5c20cce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary attack pattern involves exploiting user trust through a seemingly innocuous document to lead them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8453

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=velocity+and+distance+graph PDF link annotation
    • http://toonesk.com/upload/15372055762.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f8509d86625---66526503654.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed0a0dca0a---8879983353.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/35581173891.pdfIn PDF document text
    • http://premium-h.info/files/files/67432387381.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/kunagusemibaxinidej.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/rgrngru19dj3m0bvjfj57f2app/94987231638.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a67fdb16f---salise.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/zupebetafaxamave.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/rb4mfakephag3q5f5g1kjjnm72/lowadebaposigatavog.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610483352e905---sejodiwalipunovanepovo.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/3909505412.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb40c74a4---80437728741.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/7132193728.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/wafawedubemedudofubu.pdfIn PDF document text
    • http://614move.com/clients/4890/File/janof.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a98f3d5bb53---mifobusirifowowukolefumub.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b51cbc6ec4e---21431389229.pdfIn PDF document text
    • https://irrisyst.eu/files/file/lakavuf.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/mitumetavovifoxo.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/24414650579.pdfIn PDF document text
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/52841124182.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/03966fcd67482baf8dd44d5313fd507f/98352297253.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b208aad6e34---naninegibinutevir.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 10876 bytes
SHA-256: a2bc820de7265ca431815c77855180c3975074c2a0cb156647cf018d294ecee7