Malicious PDF — malware analysis report

Static analysis result for SHA-256 093abd04d212855e…

MALICIOUS

PDF

43.7 KB Created: 2021-10-04 09:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 667f2690b22a42c5707a69e424cf6dfd SHA-1: 83d7b051cd0448466c6bdaf6b10565f10c38ba03 SHA-256: 093abd04d212855e1cedc17ca1ac2890ca9f2e48f6312b3c5d4d4e72b7c84374
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to external websites. Several heuristics indicate that these links are part of a link farm, with some hosted on compromised CMS upload storage. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely intended for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6552

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://paidionresearch.com/userfiles/files/12230159838.pdf In PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/83668728577.pdfIn PDF document text
    • http://oldstat.ww.tj/img/file/31075069979.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/daxuzakevige.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f438965e9a---52989702565.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/nupisilorelununele.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/47827300477.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/83723072108.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/zerisotumemigisoderud.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614300bb63ac8---75793339693.pdfIn PDF document text
    • http://voijin.com/userfiles/files/90263065540.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/69749867411.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba9a25b4a3---313740257.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370433a1165---48487929879.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/tanefomurifuzega.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/xovadepuxotinowofuvoz.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/wowedegifokipukefej.pdfIn PDF document text
    • https://croatia-flyfishing.com/files/kupixori.pdfIn PDF document text
    • https://happen.webasl.com/userfiles/file/18545635165.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/91102308258.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/v7ahamrk88m5e4hgb7p3r6nh7r/nuvabitivilalefinase.pdfIn PDF document text
    • http://live-net.it/file/nawupatokidazogebuvoxav.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/64191805935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=when+we+were+young+jeongwooPDF link annotation

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