Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a781c2b29960c7…

MALICIOUS

PDF

66.5 KB Created: 2021-09-07 08:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2a24739afb667f2ec9e03905a8f0ba8e SHA-1: d4c5f4e80755bd4e8437a4246aaea435b810a6a1 SHA-256: 30a781c2b29960c7fc7791b27386dce934a24bd703c7c843b77478d394136220
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' reinforces this, pointing towards a strategy of distributing malicious content or redirecting users to phishing sites. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

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://inwebjor.ru/uplcv?utm_term=throne+of+glass+pdf+oceanofpdf PDF link annotation
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4525666436---sebabevefitusawawatuguni.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/94518439671.pdfIn PDF document text
    • http://flirdining.com/uploads/files/nepanap.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611af8eb5676d---64429592476.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0ffcad6aaeb9f51d12dca10fe833b125/rafiforadaleva.pdfIn PDF document text
    • https://charming-dc.com/uploads/files/202108241604297806.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/lazuduguzuzuxisofom.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/87396402832.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/0as09nnue12bvuhilve99n29ve/zavem.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/1igdhldhs3681l4o6n051qoej2/65332140489.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760b48b2519---29201683496.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/xanufaripe.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071afcc7caa1---18871975198.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0f95acde6---76024498985.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/sekoz.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099ffef4520c---15182674386.pdfIn PDF document text
    • http://logansport1971.com/clients/4/42/424235dfd0fdcd2d3cc2afd1e16bb83e/File/jimuzopu.pdfIn PDF document text
    • http://viewcs.com/partner/upload/dextfile/30832191122.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/53horfdmjr0iq3heohvbt452v0/jawulafusugadop.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097dfe21894d---sunuvasipifumad.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/aaa5In PDF document text

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