Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a6f1d4e5433fd8…

MALICIOUS

PDF

52.1 KB Created: 2021-09-22 21:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2ccbd60cf58f4f4a0686b8be38edfcbb SHA-1: 6c191857eb13caae25461e637ad427010c62c646 SHA-256: 46a6f1d4e5433fd8c7bfc3c445d95d3007f6310729b98e8e04040752949ab6b4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS upload directories. The URL 'https://crewmak.ru/uplcv?utm_term=whatsapp+business+app+download+install' suggests a lure related to downloading an application, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7159

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=whatsapp+business+app+download+install PDF link annotation
    • http://watch62.ru/files/files/mubanapuxagexefaxiw.pdfIn PDF document text
    • https://12tiga.com/contents/files/sunujobi.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/petunokunata.pdfIn PDF document text
    • http://rem-proekt.com/f/file/xopomeralusavubig.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/dff1227c71c660bbda99e3041555a56d/94475797625.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/36651678371.pdfIn PDF document text
    • http://lilipoupoli-drama.gr/lilipoupoli/js/ckfinder/userfiles/files/85532419993.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/33804889290.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef971399c6---13421299630.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137527e1d475---jurusava.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/69180456183.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/sidafuxubuwolexununug.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/jafibivekubovikegose.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/298caaa1e9d211b673fcd8b2a6d7de2b/kizodoxikubotu.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/bulidafaziwavuralige.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/xuruzakupenafuxewedewuwi.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/89590721031.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/vekamijexizasi.pdfIn PDF document text
    • http://normel.org/files/upload/file/merirud.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/sk5m2h4bhjob8b8lossavtld99/51508079719.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/pojejis.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/nexemetefagedim.pdfIn PDF document text

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