Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fb7b3b5a6c2ca2…

MALICIOUS

PDF

62.3 KB Created: 2021-06-28 18:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7c3b32857311b9ac3ac98f9e0d9a3cc3 SHA-1: 8817e33307dec64173dd4eb02fd8215a92289758 SHA-256: 85fb7b3b5a6c2ca28dcc045d8a4d26fc9ee269970b29356544058e1814bca021
124 Risk Score

Malware Insights

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

The file was detected as a PDF phishing trojan by ClamAV. Static analysis revealed numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly suggests an attempt to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4857

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://drafthe.ru/uplcv?utm_term=communication+goals+examples PDF link annotation
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/789d8033421ac90545a1f3e871e7408c/39913476509.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/61724079678.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ce850eb5906---26611108135.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/8e234ca228e974eaed4e397625ffddac/27403628970.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/lowizadetasita.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/85348949620.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b9809baa---kobipoxusesekugorajuviz.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/jipuvotofibinopagoxamo.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd0fc5ca0---motuwugamokadarapelamuke.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/vipomujelujete.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3e16f5ec---71672132553.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092950310f7f---6088188574.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/973acab69506871d269c8189e72be274/lulukakomigirolazup.pdfIn PDF document text
    • http://lemanssrl.it/file/53751456842.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9a101f3c6---zuwatiponekesire.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/refenikofasexuxapov.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b000f96b909190e84555cea2c72e75b6/jezetuwipimoruvefubabe.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7ejdu714u33i4a0h7b7tgeojma/4005754617.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/1ddf3705869cb4c0d68d9bcfe1152dc6/82366885187.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e98404cb24---varevejaloxidewo.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096849be1ac4---laxiva.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/pufeguviwufaraseni.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/35297059634.pdfIn PDF document text

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