Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c0939b8ae13d3a…

MALICIOUS

PDF

58.1 KB Created: 2021-07-22 12:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3c164eaf7d600be2007f51f9dcd357b2 SHA-1: f1307055465befedf058e4b2bcdd7f991126ee17 SHA-256: 51c0939b8ae13d3a160d046e4ed2cbb70dee810df03ffeee64a316672c039efd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to what appear to be compromised WordPress upload directories. These links likely serve to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9404

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61ec982fe4---16998944818.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f109cec43f5---13938834066.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/97200128182.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/pu4lvsam3efikjcogd21dj7qgj/67823745650.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/95916023907.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f5f33729408---pupejafij.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954c798681e.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/9cd6251eca7bb6a02c08eda4aea873c4/66002174334.pdfIn PDF document text
    • http://ashioke.com/images/library/File/jemojusirodinesiri.pdfIn PDF document text
    • https://farstaslottsvik.nu/anvandarbilder/153/files/36357272118.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/50cd9a285b314b65441efed8e2bbeaa1/26210658510.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/gexodanibuvaduzap.pdfIn PDF document text
    • http://servmed.net/userfiles/file/24964346337.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/vusupigajaso.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8c833aac1---jutivuv.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/7bn66jnd6rgscp5g4rqfv79ogh/wasuzezitujew.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/qqu20rkhhorshkr6ti49umnfm8/7181548883.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dce42d154---66861218771.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/9c16ba634b36719bc40f73dc1800ff48/38181611790.pdfIn PDF document text
    • http://stonebreaker.at/wukopugevifufitalebe.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079412789e3a---32935479884.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/92334e7e929382d3d4c92227325b7a79/juwisewibojagimo.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder//userfiles/files/74831032070.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081dd3cf1dc4---84328176849.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/39b887a94c8281ce6c587b5a70ea6593/32867638392.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=property+for+sale+in+bexhill+old+townPDF link annotation

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