Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb0f471904a3085…

MALICIOUS

PDF

47.6 KB Created: 2021-10-12 17:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2848e082444b3c4c79038e21f172b145 SHA-1: 2919652d010db555497a1c5b66c51d5f092baa86 SHA-256: edb0f471904a3085a37f78de5364536bd3213d3e52e8b33013f0ba56264b8aaf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8030

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=thin+out+synonym PDF link annotation
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/84b3cc784dc52a1f0cde3c2ee5e708a5/xiwuzejesarofufonero.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f70751df3---zefenarewuriposun.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/44907581074.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/63074948033.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/teravemajixoga.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/s9n3ph8vaa49d6e3943buhl52o/nisavemiwedorilosaxokobup.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/pitalapofavorifezobiziku.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/14170906111.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e42d50c3---3284177026.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/koxuzedawuve.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/gimuni.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/retorogepaxufedi.pdfIn PDF document text
    • http://gibisch.biz/files/files/firejapotarezesom.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/jotadobukitomanijilomude.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/5462454410.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109151301397901.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/siwokenadowoditesiw.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6a1dab81d84c58e18896c805929b1a32/78694296022.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/82302295823.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/vaviwofotilaseget.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/vewefawaperojudazujaruf.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/vegenixebonufamupuwasiki.pdfIn PDF document text
    • http://phfamilyrestaurant.com/uploads/files/dipubolafedememigeroxo.pdfIn PDF document text

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