Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ef13bdd7cba155…

MALICIOUS

PDF

62.5 KB Created: 2021-09-05 19:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6e5b375e4c23999ac28065b47825557f SHA-1: 558f4a14f5f3f50490ff3ab4e463ec11306c476f SHA-256: c2ef13bdd7cba155ec55873184a9061e3e8898ae7c69bb04f08c61c1bbbab526
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

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://drafthe.ru/uplcv?utm_term=erosion+control+measures+pdf PDF link annotation
    • http://youandisagenix.com/ckfinder/userfiles/files/burumutenobaginetefuze.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/5ba1e8023dad822f167bac0f3aefe6ec/78942741312.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/xiparuzebaxitugeja.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/wavotekokabanejudosani.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/57573397713.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/tifafekakilebusedeje.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///56305297365.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/d9caf09417af28a4f4145f93fea555ad/jigasekinofovakatepijived.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086e5fc969b4---fobuvesamug.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59ad9241c2---2226845192.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/romigikufoxeganufuk.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/5708006507.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/nesexevujekutatuxufibuvoz.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/pasutajumejibo.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/dipenufavuxevimipotem.pdfIn PDF document text
    • http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/lugagexufufizedazud.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/75565863600.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb6bca9876---fokikanaburigurijef.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/stoeu9t89slrplhipl87idtah2/43363427567.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2724a755f3---21135378297.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c248fd4c---pagotezimiribuzobujuwiruz.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/xewodabikoluxoxijix.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/37233661386.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///58773913051.pdfIn PDF document text

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