Malicious PDF — malware analysis report

Static analysis result for SHA-256 d480b5a93bf61aa9…

MALICIOUS

PDF

57.0 KB Created: 2021-05-20 21:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e4d21f006630d4e970aad910eb465b5d SHA-1: 32df4fe115a3147e1dc2d345ba75458b7abed495 SHA-256: d480b5a93bf61aa9613f8c73aa6c5952dc05769c222fbec669e98f60c23710d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious payloads. The heuristic firings indicate this is a phishing and potentially a trojan delivery mechanism. The presence of external URIs and link farms suggests an attempt to redirect the user to a malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9470

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://laborke.ru/uplcv?utm_term=rockstar+full+movie+watch+online+free+in+hd+download PDF link annotation
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/50374a1019f5139a82e6eb31973a379d/43746031663.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608423cdb7e04---vufowulakuwebaguvigirigo.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/4835515702.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cce3d0d66---30262649854.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d90264c369---jedupamu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e44f37572---37405264556.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/05e3b8eb772c50462c5487d0258c2ccf/70666019475.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a99db04d54---kozupasivadefiwexudomud.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/03641c300fce9a4a6912c6e5d4a75169/bomubu.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/491943631.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d43af7a5---25508938588.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/u4467gepas8p3k6ai3ajg76cqi/67198026738.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791288e78b5---81773738163.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/3b49256a44be3667a1cca3705bea16ac/94455630301.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cba213e08---kizavabimugazidisefaxel.pdfIn PDF document text

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