Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6d7f84e59ea0f1…

MALICIOUS

PDF

80.0 KB Created: 2021-09-22 14:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dcabf90fdc671722740efd74d0dfc7e4 SHA-1: 550c2c245824b337438062cee08b824c5de57869 SHA-256: 0c6d7f84e59ea0f19d4f9a90393392861a539d7b1cc5e2fb7a629ff9e77a3670
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also functions as a link farm, directing users to multiple external URLs, some of which are hosted on potentially compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5329

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://irepairplus.nl/app/webroot/files/userfiles/files/60734418526.pdf In PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/54563706585.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/23942707060.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/bajexujerozujixeroj.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/mirabirezupeputij.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109161910253919.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/3179667384.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/tabobivivogitasa.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4de74178e5ce9317ab9e870fe2725369/rogaxuriwixirawebajapom.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/duxowasijonisojinu.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/76580402023.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/wokizepufudax.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/joxet.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/ruzigabusevugubo.pdfIn PDF document text
    • http://matrixpaint.com/ckfinder/userfiles/files/jufamazisufa.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d36d8d6e831d8e9609bf02e0f5a2727b/junuf.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/99884971647.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/35586966853.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/15752450149.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495ea854221---50586565341.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/raxofuvigidakijepitukozu.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/gekufu.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/zogebirijotimabideni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+type+of+fashion+style+am+iPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/korof.pdfIn PDF document text

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