Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d67bd482899972…

MALICIOUS

PDF

69.4 KB Created: 2021-06-13 05:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4b99d98083794b8026a2ee09328fcb7b SHA-1: 8a1bffac67c3deecbd3915381a2a77f3b4fed1c8 SHA-256: 39d67bd4828999725f06460837f22f55297945d1069310d5de7243a202ad4e86
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The heuristics indicate it functions as a link farm, likely intended to redirect users to malicious content or phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7588

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=fire+mage+pve+rotation PDF link annotation
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ik26hke9e7it9bfh310rsq55g3/91585319309.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/82492959801.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/komuguvofaromokojozi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607923fd287fb---97358547151.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/banenepozelod.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078be9f5957e---51469650579.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c74d8a074---62948288947.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/pifem.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d64060596a---40895101218.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/n1oct7be9svat80gmt2mh7qq28/90583485060.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/lonuwanowo.pdfIn PDF document text
    • https://koratspring.com/upload/file/60377300179.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210612_D654758D844BEEE2.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/xedatixanuzadogumevirilot.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/98385423240.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b08eea56e55---siwubinikamu.pdfIn PDF document text

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