Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd996d0fb5335bb…

MALICIOUS

PDF

56.1 KB Created: 2021-05-19 10:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f581e3c9c455b9317b8edd23b35acc0e SHA-1: 57b4656ef46ea1ab9e2749d4e7aaa1772022be4a SHA-256: dcd996d0fb5335bbfc6796bcfe1e84d00eff3f3fe7689f51169c27badb9004f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of 'utm_term' parameters in some URLs indicates a focus on SEO manipulation for traffic diversion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://cructi.ru/uplcv?utm_term=carrom+disc+pool+version+3.1+2+mod+apk PDF link annotation
    • https://gbagencement.fr/uploads/file/kutanuxapamugaw.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16075ba2d99fff---revoji.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607604490f28b---8996250379.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7000d2288---fepobowowokugig.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/54654250109.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817c04b8caf---82872111171.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098401ff24e2---78713301678.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/23731421350.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609252894033a---93227911856.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/54766100297.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/gpd8k7hqe0rto1aftleoojqk01/binopo.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/vs9g54gqpv30khfbtq2ji8an4l/99871817914.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/90cf479f80c87319ab49017574a9d7d6/tinexuv.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847edbcbded---gozom.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817c4394f8a---20069558353.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/forosu.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a16cffc361bd33e0232a4ad8c6bc0aca/jakifirulumel.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/167p989j0haih140m3blloo7ge/30703097731.pdfIn PDF document text

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