Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6064f378e9da59…

MALICIOUS

PDF

54.0 KB Created: 2021-09-16 15:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 164f8f42616a64e7d9ec9c8eecd6f73c SHA-1: cade6efa002dfe97a79191154a3f7c5a86ac89e6 SHA-256: ec6064f378e9da59aa2b66d76a5ff17a3629b18c546cb5870e8a10cc33b93671
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6253

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://huntic.ru/uplcv?utm_term=gta+vice+city+apk+obb+file+free+download PDF link annotation
    • http://hwayinn.com/image/files/20210913_050418.pdfIn PDF document text
    • http://retailcop.ca/files/76904197871.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/korujajewesibunidasora.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/nujinurimaj.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/99420169332.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/bopetun.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/29657527582.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/gth9629f8o45p730r6vb7icdg5/bibusif.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/nibubinekugaseminolubili.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f88db867fa---somalodofasimanuzoloxar.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/44442520349.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/pabipal.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/7123224364.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-10/20210910012758379520.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/86419803400.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/14665588375.pdfIn PDF document text
    • http://skupka54.ru/upload/m/21868273223.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/12050241437.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/vitunegadepasezabufulidur.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/wibokokofupebunokogapa.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/89428342960.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/98267838631.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/jovodag.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614096bdb03f2---94792851333.pdfIn PDF document text