Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6de1e1eeec5fb07…

MALICIOUS

PDF

67.8 KB Created: 2021-07-27 15:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2f1bdc597b1ce816d3184f7ddff0af7a SHA-1: 473358fb41927f86f118dc848c7d0a4b9e09801c SHA-256: a6de1e1eeec5fb0704ced292b457844703eddd73169aae4307368abf557f9f60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6947

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 http://dream-mebel.com/pic/file/80586770657.pdf In PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/07ee10e6c8fc596a9cb7843c2060b126/43827842157.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/1390464269.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fe2a9b7e4---19218807979.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/toacase8ab5soqpv4ima9jscm2/43047340833.pdfIn PDF document text
    • https://ksuskalology.com/images/file/21445055004.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/narepijesenegogujabur.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/130cfb045763de1f5763c4577b5c3a3e/lobulosalegovu.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd5d244ff---90245603989.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ce3c4bd57---87582507804.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/13525429954.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/guwafekegimakos.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c036f175791dd05127bb570c4426e281/refukupavovizi.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a138fa87e2d---lideg.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0427b6a5e603f0b1b85f8ffaf7cd37d9/68845041533.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/66c76b5c55653e2bc7b546894898441d/gemarimonitu.pdfIn PDF document text
    • http://airfa.it/userfiles/file/82730485951.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a772e1bbd44---zojadusulaxenovij.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/80598382940.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/o4i6bnjothb384rmq0ourdln9p/99689078246.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/7469979064.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3aa97e6e1---dibejafop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=a+smarter+way+to+learn+python+mark+myers+pdfPDF link annotation

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