Malicious PDF — malware analysis report

Static analysis result for SHA-256 509ed063418ecc63…

MALICIOUS

PDF

184.0 KB Created: 2021-09-04 09:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb2aaf80d0f19d7d532189c291f3d069 SHA-1: 63c0f55a59d75e83ac0d75b450e7157d15f952bd SHA-256: 509ed063418ecc63e83dc48e306bd6ce56fd4b1a6379a05007cc44fcbf97f499
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8638

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=cpt+professional+2019+pdf+free+download PDF link annotation
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210720141259.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/wopesimubav.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/10925384419.pdfIn PDF document text
    • https://drsaman.com/files/safaxedo.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/64b7c8c1202f8d50eaa86646485214de/lomogamovezujasofitotep.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/858602183.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/govomepunix.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/16927061050.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/8802977553.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/nuzulubi.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/70859578782.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16081b21263aee---puxudivujusesinawi.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/51217028956.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/jafuguvim.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/xamosexawa.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/tifokufagopipazupunaje.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/jukowedelasal.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95ba1e0699---2041827458.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/c91a0eb0349d7724f01561854494c8b5/44006396852.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abce2c5b125---66733962438.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b03dc8e00fc---36188207668.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607991f30d0d4---47403115204.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/28395771622.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee395042f2---gelapisoxeso.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa70cf33fa---18450275618.pdfIn PDF document text

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