Malicious PDF — malware analysis report

Static analysis result for SHA-256 10eb5affd19c8afe…

MALICIOUS

PDF

47.6 KB Created: 2021-09-02 01:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6d7ae74ccddbe4150d5cfc8c2dd6237d SHA-1: 2cb18095f52ad1bdf33f44048bd119bff2a954e2 SHA-256: 10eb5affd19c8afeae6ecb7e6af2694d2b1408b395abc98151998a45ece44c0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous embedded URLs pointing to compromised websites and disposable hosting. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8156

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://pistant.ru/uplcv?utm_term=department+of+environmental+protection PDF link annotation
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/kerevadalonekalizoguke.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/36658716072.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/76895388945.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/kvqljt6gvpf835fm2lq41jp7mt/15447143036.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/428370df4018045e24be83b9bf41dc19/nawokedurevegamekixatuso.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/22854407404.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ff7e40a0---jusikujivegutikatekoteret.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b00fd0b4c8a78316c7aa86e30600401b/buvififokawamukulipuka.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/vefosedipenalini.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/nixijajo.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad947b5772d---lenokutuziwezi.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fc13ee7124eee471e709df76f90b7992/45804413469.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/45741624769.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ol7g0p4ooibqqm7010f4bql627/31487872080.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/h6ptkbj8481sno3i4t5rjojlj3/39812743019.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/fajajigipokozakige.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/7a8a02567541ed7268a0f5d1464aa541/58282603782.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/68164888129.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9e619a7c781d16278a9413dcd7a8c2a8/vofutoto.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/jipul.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/99078154416.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/99299567392.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20dbbcaa28---biwuxejo.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/a756d671ed742be2767879aa0a1ea3a8/54493708137.pdfIn PDF document text

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