Malicious PDF — malware analysis report

Static analysis result for SHA-256 da598ec7b70ad54b…

MALICIOUS

PDF

47.5 KB Created: 2021-09-03 05:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4eac4a87f97e32bb0ed5624832f150c1 SHA-1: f7e0e3a72f34e85dd0229aaf92e40a74a62ddf03 SHA-256: da598ec7b70ad54be627928fc5cf61dddf5e5f5de5cf9426e5524c60a7155266
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains numerous embedded URLs that function as a link farm, directing users to potentially malicious websites. Several heuristics indicate that these links are hosted on compromised or disposable infrastructure, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 https://garglob.ru/uplcv?utm_term=how+to+edit+pdf+documents+in+google+chrome PDF link annotation
    • http://szintai.hu/ckfinder/userfiles/files/49349158665.pdfIn PDF document text
    • http://honghuibio.com/d/files/57312675723.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210627025408_3h371n.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/50721129000.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f4b0e40d---1526227399.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/perabajo.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e66e2f12c---9247426442.pdfIn PDF document text
    • https://argumentua.com/i/file/zurujupuvasevowi.pdfIn PDF document text
    • https://braus.uz/images/shared/file/64164729628.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/27732401012.pdfIn PDF document text
    • http://evola.it/userfiles/files/19565534531.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/s13eq123p6emkb01kv4pacsa68/nunilako.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/7940519734.pdfIn PDF document text
    • http://theponghop.com/upload/files/13513226576.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/juvabo.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/gn1635f7hccm4qsrh4lehae85i/medofoledebajafipu.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/72181489312.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/57378696833.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/gafuzoj.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/85152644357.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/gagujuvola.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/lebuzabisokiwakonivol.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc5134cbe---95554151003.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/6274671592.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/25068574721.pdfIn PDF document text

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