Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc98d404e812d57d…

MALICIOUS

PDF

61.4 KB Created: 2021-09-08 09:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36c7b558401c26ff44236e04cb313129 SHA-1: 2b4a72ed52d9daf533d7ef5d1aa3b22f8b741fc4 SHA-256: bc98d404e812d57da3e6bd0ad94bd5fb0926526ac554608b01df4b41ce4dd321
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5895

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.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f94c871502---kukajokizuzejusumewewade.pdf
    • http://doubler-son-capital.com/photos/files/30762387322.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/db9064c801d1fcc48973d324850b3c23/difizazevogutunefugodasu.pdf
    • http://stepasidemedical.ie/images/uploads/file/34598410707.pdf
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/14576566314.pdf
    • http://palami.by/images/file/48507981410.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a222ba04c9d---xuvabekelujonore.pdf
    • https://hondamienbac.vn/userfiles/file/latuguvonarutis.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073fd3eac6be---69464725931.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf842112ac7---67488610998.pdf
    • http://home-hj.com/up_photo/file/3724999773.pdf
    • http://bigcool.net/webroot/img/files/23981214057.pdf
    • http://designklasse.de/ckfinder/userfiles/files/8945525599.pdf
    • https://smartstone.ca/userfiles/files/5205281069.pdf
    • https://agrilaui.com/userfiles/file/xofosakemetilawugimox.pdf
    • http://rabotatver.ru/userfiles/admin/vupegalo.pdf
    • http://guidesdugrandlarge.fr/images/import/file/museposoketezoxadatuwow.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073e04545f87---7433050309.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/56581595163.pdf
    • https://viboot.com/ckfinder/userfiles/files/2236451153.pdf
    • http://www.sealjet.mn/pictures/files/lapezupu.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161042bc316825---77102567009.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/19a9cacbde0117df172e32dd18ce72ce/54933106635.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ian+mcewan+saturday+pdf

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