Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11f27cd52321afe…

MALICIOUS

PDF

59.5 KB Created: 2021-09-13 16:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1939824be6c66fe0bf1a8cef6a573f93 SHA-1: 3d73a145b64961b01056b0f3afadab4349e3fdd2 SHA-256: e11f27cd52321afed17ef6fbdd6f64dca5a97a02f98e92470ecbaf5bb5696328
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a link farm, with many URLs pointing to various websites, some of which appear to be compromised CMS uploads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The presence of external URIs and link farms indicates an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4489

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://krisoc.ru/uplcv?utm_term=the+crew+2+full+game+download+for+android PDF link annotation
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/4a19bb48af5d1b2f7a17fd9b6c08102d/84309849158.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/70884179917.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/32832024455.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210912/files/20210912181228.pdfIn PDF document text
    • https://sentralperdana.com/file/26055641416.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9a770213c---81305541010.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/gimazafalikululiros.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/ganotetopivuxenisivek.pdfIn PDF document text
    • http://htwy.com/upload/file/gotonuwufu.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/49666142518.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/7398044573.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161399941a4bf0---duxatufabolu.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210904053457.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e21b4e051---pigikapu.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/vodofulata.pdfIn PDF document text
    • http://panova-art.com/files/file/bafozutoj.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/67057972201.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132588213ea5---82773045025.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/263ba245fd8307bf6493f38be02dff6d/20537963658.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/80259003724.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/94591210581.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/novosolunobuzogiforo.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/67552108557.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/tovevezelitazafif.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/1767204560.pdfIn PDF document text
    • https://nexapos.com/upload/files/rovabimizixefolenopu.pdfIn PDF document text

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