Malicious PDF — malware analysis report

Static analysis result for SHA-256 f089a5f1af4fe02e…

MALICIOUS

PDF

81.1 KB Created: 2021-06-14 08:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9078537b0bf4b58830ce91a0f7b439e2 SHA-1: b51c71b5898a8e7765c39b1701f220a0d95eae1a SHA-256: f089a5f1af4fe02ef744462e33660ca3c3605cab2b1d5e824c20820b25ad7928
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs likely serve as initial landing pages for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7543

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://pistant.ru/uplcv?utm_term=impact+of+environmental+pollution+on+human+health+pdf PDF link annotation
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff80e17cf325b2f14bfe324d2e0be02c/jitotifawaxuz.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021042920390673499.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab07f6cae4---mejisojimakaza.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/28238672901.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/dj8jal5cv1nft7fl0vv67fgda7/lesufemejojure.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/kizaxanoroba.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/rsqiqu0pnsjt5tg78sp4ijcch4/badoka.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/e5ogn27eppkgl4nc37fv34vu42/24375494506.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3f8e1e39f31f595b499d74507fbf6026/81311883798.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904f323cf24---66757262953.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68be06f919---tawewitafo.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/xipoxonuwatogani.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/vtgbhprihc4rccdahr8l04d9g3/43605126007.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/da609c11001fdb2ca556bc9369f8280f/jexefadaboxulazaz.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99c7b985a4---32332454376.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4aae172a9b27eec8d84f99d866eb23c5/48094988589.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/7db61ca04d9f8389b1dc4980925c2109/74315569159.pdfIn PDF document text

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