Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6ea6af1086a5b5…

MALICIOUS

PDF

64.0 KB Created: 2021-07-25 16:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2bc2d503076ef4e339367ed09a3b1066 SHA-1: 36564d81f3f7fec27f95d4b4082aad6cd0e12dbd SHA-256: bb6ea6af1086a5b53dfdecec04f65cbd9763b4b9460574fbe36e4c476ffa4b4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9533

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://carszana.com/image/upload/File/vefukiwufe.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4369ae33b---taxokiwuxilomasor.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/29779293960.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96d1ce4b67---mupafedugiwebexadojugufel.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/8cd97a34bc2459266db68e3e620f5cde/31991270042.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/36045403271.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/94de6itfq94n6qoqubc07dugno/48475828781.pdfIn PDF document text
    • http://djpress.pl/Image/files/35398076016.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ac3026d4c---62728269339.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa42cf2002f---66808898105.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/45609407633.pdfIn PDF document text
    • https://mavibusiness.it/file/ralipixakusuj.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607366b2cd4e5---15502551232.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b14db14f1c---detesozalopi.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/70090374752.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/lubuditewinu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e649e3ed4a47bad12c7b752284c32204/sezanunagewewamapof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=cuadro+comparativo+entre+las+ciencias+facticas+y+formalesPDF link annotation

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