Malicious PDF — malware analysis report

Static analysis result for SHA-256 457e3d04cfa2698e…

MALICIOUS

PDF

64.0 KB Created: 2021-06-26 13:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ef2e37b41209f1024d87e04509b10c8e SHA-1: 215e72ea373a6f85e569e972574564631b090e32 SHA-256: 457e3d04cfa2698e3f24966d263a3d50389f2479c4ed97fcfac9db4e5cae5328
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, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The use of 'utm_term' parameters suggests an attempt to track redirection, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6844

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://archism.ru/uplcv?utm_term=the+freedom+of+information+act+2014 PDF link annotation
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/bf7937e1f24135362ea349f96d6f3834/6858147394.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3fe8jtq3nodfhjn21r9gajrema/64513189515.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/8iur50rr4uh13ksitrmp2mj50e/48839487323.pdfIn PDF document text
    • http://abpaluso.com/upload/file/reneda.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/7588533177.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/62467759188.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5574cae5660fd8f93bc2c24c2b563bd8/43541683639.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/zudavekebefu.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/sakebazidivilowij.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c380b36786b---fosebawipisi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/1894e01b228f73836297751a7a97befb/42270761117.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/zezufovofosi.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/97b5745b1066d7bc532d3236f70779f1/mupetaxovajexobetumurafu.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/d2a563dfa68c41e20a9812356ea42e97/moxerakurovofizemar.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/79969771720.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fsl48qi4i4ghg6hkqrsvjso1e5/nuxewuserize.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/v4vdro0v2dl24tpsjovsvh1076/nubunusotup.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c99503ccfa---36872043149.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/13502292473.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e4fa61e4a---51150909186.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/pumabuwurar.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/80119439856.pdfIn PDF document text

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