Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1538b3c37429fe…

MALICIOUS

PDF

80.7 KB Created: 2021-08-10 00:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: deddd11f1345cd028e6787b64da9dc86 SHA-1: 2848a5e68c56e653349814302c2f1e93fc17dfd8 SHA-256: ed1538b3c37429fefe16a5ddf27ca52b659d8aa8dd063e52dd50e6847a6f9d9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to compromised WordPress sites and appear to be part of a link farm. These links likely serve to redirect users to phishing pages or download further malicious content, aligning with the 'Spearphishing Attachment' and 'Exploitation for Client Execution' MITRE ATT&CK techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5681

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/cij8tdfl50cldu5bke2pfr1h7o/tanipalavetav.pdf In PDF document text
    • http://meta-min.com/files/73648148862.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/berituponelibada.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/36815123319.pdfIn PDF document text
    • https://kasihjp.com/contents//files/dajawuruk.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16104a881c5e1b---34604777271.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/d1vlqp4rlpe4hbrcdpsnomg9b6/90137391122.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/bijemekenosuwokulakavo.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/d7b799dd3a74e9113fe59ef5c14d92af/66044871465.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/84559238464.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/kugakevotegefuzefegiri.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///fanaxopep.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/3i5ptmi8r4301auhv16277cd80/vijorewape.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/xitirerapenes.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/16515638044.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50bd94d841---89460447485.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/zimorimexatadusexex.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/litabegava.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/xedokumapogibun.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/runowubololidagadabe.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0621794a6---74438882510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=test+de+denver+pdf+descargarPDF link annotation

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