Malicious PDF — malware analysis report

Static analysis result for SHA-256 143c7354b16c77e7…

MALICIOUS

PDF

72.1 KB Created: 2021-08-01 22:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fe1717d9e475de6f03b839dd0df892b4 SHA-1: 2f5a29bf16953b61a445302a0a9c4d8dd6ff597c SHA-256: 143c7354b16c77e7225114833029e964edb11cae5bc2eaaf99ecb7091c64bc26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b548cb3a3---33631350416.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4d2f97f70---92313875405.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb2abb6648---32625900209.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/e7761de38ee00d17c3e90133bcf84505/80980446564.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/aucofk3j29o5n3od3brsm8v88p/kujalulatu.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/t02pnjv3qi7thb1jbs20htgaks/65763845269.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/56940279328.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946307bdc1c---40017392051.pdfIn PDF document text
    • http://adainst.com/uploade/files/20210620183623.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b941414851e---68887860203.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/rilosigigifalufikedus.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/34590009792.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160857276c1fa9---puwugovopiv.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/b67be506f7a796fdc5ae3c44fcd3198a/kakarax.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/e480563aa9823954d27bedade36ae331/nuxaperozufibu.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/vakux.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/mojazigijerovafuwapowe.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/20192226544.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/delupozi.pdfIn PDF document text
    • https://davaocarrental.com/images/file/jipiveb.pdfIn PDF document text
    • http://herve-coiffure.ci/files/vuvoranaripalegidat.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/72904110001.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/10083016204.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/miforexonabonesopimas.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/mvl21ss3nco22imffj661nj44k/65466765432.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106cf1cb187d---33246199189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=lean+history+toyota+production+systemPDF link annotation

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