Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf78f5dc277ffa9…

MALICIOUS

PDF

534.1 KB Created: 2021-04-30 07:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 165af84c5332813c8458bf9ae321e263 SHA-1: 8c8acf62d953c4b9da2357ada3972fcb4534305a SHA-256: bbf78f5dc277ffa973326fb3afbc585f83deb1e52fe13ae01a60fe824b714a64
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress sites, specifically targeting upload directories within plugins like 'formcraft' and 'super-forms'. These links likely serve as distribution points for malicious content, potentially exploiting PDF vulnerabilities or delivering further payloads. No scripts were extracted, but the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0745

Heuristics 4

  • 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.
  • 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://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/d5v7at370nps0nf23p4cd2er52/83586485198.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd38851bf---jukapavitat.pdfIn PDF document text
    • http://abpaluso.com/upload/file/65622995611.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4974bb579ba994fffd7c2cd637ece754/jusarerukivigu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a76bd4bb6---42820971074.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d707a63d0---70973724602.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846a0e8ce1b---dulurobuvavaludezumi.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/5c9ktdvs5d0v50uvu7pacnbch9/xaruxekesolawodebigomi.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608045d326240---wazovab.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077f5ff404a7---zivalitanawimurakibuk.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb446ddde---58251702986.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/4080af2b31d558337016c0ee753d200a/tolevezebanajurivujupefi.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9af6ec98---zawipemosumomumomixut.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/v9gj39enpgpnv91bdg676pdkp9/baribapadozejetolise.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718a64566f9---53211966665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=pdfbox+bouncy+castle+dependencyPDF link annotation

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