Malicious PDF — malware analysis report

Static analysis result for SHA-256 5618c7291a1944cd…

MALICIOUS

PDF

46.8 KB Created: 2021-09-17 19:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: adddad3b84b0735e977dcef7e8ed1c34 SHA-1: 90e74ba4dd23896ad2abe8fcfd3c60f582a3c688 SHA-256: 5618c7291a1944cdf59bd1584b0b0abb8b772702cbde50e4ed601a44ca90f9b8
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to external resources. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6766

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://queure.ru/uplcv?utm_term=mapy+tras+rowerowych+na+androida PDF link annotation
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a3f6f5d4---51525585687.pdfIn PDF document text
    • http://phanvienphianam.com/uploads/userfiles/file/80305206966.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/faluzefasonewojilimo.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/niwiwisuxuz.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/nilivuvenupovusevonev.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a303aa527---46362769187.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/lodefi.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/16564760539.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/52479584016.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161426bab1afbd---ponokewazipaxapulipopefir.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/vutanaxuworumiwaj.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/zapip.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/bifuzotapudomigina.pdfIn PDF document text

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