Malicious PDF — malware analysis report

Static analysis result for SHA-256 236bb34a26b9fc76…

MALICIOUS

PDF

63.7 KB Created: 2021-07-30 14:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c7061e11ef3ca24bbcd5d7525d08a38 SHA-1: 546c23d7165c8823f07abeb135c366de91462883 SHA-256: 236bb34a26b9fc76d03a856d4cfabbda00e78ace756f31eed1c4f9984b40bc7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

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=portatil+14+pulgadas+cuanto+es+en+centimetros
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55b9654c75---36565480234.pdf
    • http://hpworld.hu/data/pic/Image/file/3734985766.pdf
    • https://swift-tw.com/lcc/upload/files/rimavirivujomide.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609064ae4d6f5---rubakememo.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/32066812641.pdf
    • http://language-coach.pl/uploads/files/77373759863.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b89123475---vimiluku.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f914df8947960d7b7e1b6fa7eda7b4e0/9419283875.pdf
    • http://kasintorn.com/images/upload/files/4002598594.pdf
    • http://dentalclinicbangalore.com/uploads/6472706210.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/mkscdtj5p25uch7ukjubm79pdl/diwipetozijonukubapukoso.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3efd12f751ea494e3271275650ba3cf0/26187543466.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f11869b80f5---16143168028.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/gnrlfjghrpe1cqdtffsbqvv03m/kowoxarexadese.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6titfeu88usci2o2ps1jhijp1t/61832979169.pdf
    • https://southwestlooms.com/admin/userfiles/files/18453457115.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/lokamokirozodexusuxaxuv.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607c47e03a888---fositojorilabidewofug.pdf
    • https://aqua2go.pl/galeria/file/55060297354.pdf
    • https://triangle-electronics.com/assets/userfiles/file/9860770456.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/je62imteo6q788ce3d02bur54o/tawisega.pdf
    • http://writtenmail.com/upload_images/file/bikarataw.pdf
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/volodiwepuxitik.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607751bb95b78---nobedosifobejofigudisezot.pdf

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