Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1e3dd734b9251c…

MALICIOUS

PDF

62.0 KB Created: 2021-09-04 12:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac0599edfe012077f39cf0eca360d0ee SHA-1: 09da06dc3a2df5d3063a038a3dc6ef56b12c76b0 SHA-256: df1e3dd734b9251c5055b9bed693370d7cf0827fd4877fcfccb2f68702cf9753
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. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting it's designed to lure users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

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://grancom.by/upload/docs/116127637.pdf In PDF document text
    • https://serwisnawigacji.pl/userfiles/file/lofufejuzasajoneripo.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/fejixorelimexiki.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/18590063941.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/9ab8adf355caece12b7e0e90b4044746/woximozokepupeguto.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607065afb6eec---21869592621.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/f9a7f87113891b7c68ce8856871abe00/52321385965.pdfIn PDF document text
    • http://scantech3d.com/files/89526253122.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6a0ab2a06---46540708773.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/42245402910.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b2589fe8611f8b73cec74bf3dfc70cc/36529686105.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/sasobiboratuxuj.pdfIn PDF document text
    • http://banquat.com/userfiles/files/wovoruwidugat.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b71c7c4b84---64168180830.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/72274156114.pdfIn PDF document text
    • https://datajournonepal.org/files/lapipuzudukivo.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/40713176792.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/tabutogudedadelofidi.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/52952759176.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/55e0defcb56969c3335a10a8d1403ec7/13982140379.pdfIn PDF document text
    • https://lapakunited.com/contents//files/76297957410.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/desobupikusujekonoba.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607705195d9aa---6348891468.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/r1mg8udi1glidccttisrbej4l3/28027502934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=female+reproductive+system+diagram+pdfPDF link annotation

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