Malicious PDF — malware analysis report

Static analysis result for SHA-256 899cdd5902296d75…

MALICIOUS

PDF

69.2 KB Created: 2021-09-05 19:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 706dfcd5bdf96311919116f7d879cb3c SHA-1: cb02d8c8248579153c776c765836e543f65f3240 SHA-256: 899cdd5902296d7547c55bb5ae5c5c7db343def0e19eb8589cadbdf67470c808
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The presence of numerous links and the use of compromised hosting suggest an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6541

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 http://dongamold.com/fckeditor/upload_files/file/lizuregokupakamadodixati.pdf In PDF document text
    • http://fygl.net/uploads/file/222057026241.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/vqcf0r4gmido19o4g9q0pvqduh/wimonegikok.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a7183375192---webofofoxopajumipaninuxa.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16115c9755d5e8---57566389398.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/37389989936.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/werabonu.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad4172eef4---tuxekubem.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/18221657671.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160fd7167685a2---zisijotagudugivoworanali.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a1e5105d---nunadiwozitugozo.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/tomuwurugefali.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/refipe.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/032fbf77996e97bec716aa5eebcd63b0/dimosubegufun.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160967eb0ef9e5---81616973425.pdfIn PDF document text
    • http://xsteelstock.com/d/files/gerevavu.pdfIn PDF document text
    • https://le27.fr/docs/file/80702999979.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/malunipofoj.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-30/20210630160304990696.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610610e101641---buxesuj.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/34255163572.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/47060784367.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d65e35f33c---79141442515.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/67274708469.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/lekakixorotasatakudof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=trapezius+flap+pdfPDF link annotation

Related samples 8

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