Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e12b31e7f1ed1af…

MALICIOUS

PDF

87.6 KB Created: 2021-10-07 18:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 32a78dea6cfc8e1b2421036fc6c21141 SHA-1: 5a9e9153b610637db3358a86f8e9b6e9a3cceda9 SHA-256: 0e12b31e7f1ed1aff0934de8fd3cecd64e2f1ba0cfee09fede7a50df3b54516c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to initiate malicious actions within PDF documents. Heuristics indicate the PDF acts as a link farm, directing users to compromised websites and potentially disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6355

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://only-svet.ru/upload/files/wumepuximedodutem.pdf In PDF document text
    • http://chickendaylacrescenta.com/uploads/files/dowulubosupurej.pdfIn PDF document text
    • http://semanbio.com/upload/files/terexabedimabubo.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/10140205805.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/79182600373.pdfIn PDF document text
    • http://www.perlodrink.com/documents/88741092453.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/43762427846.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109022259516097.pdfIn PDF document text
    • http://klenderbio.com/upload/files/nitarasar.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/49848827317.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/gemetepub.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16152fdaf568b4---ruzabuzokofefon.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/88674464182.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4a1479930977e63722782771d0c74338/kibowabe.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/nalame.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/wubovajagidudevora.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/fjt421te504i0gb2mgfvurc6s4/lipakideruxutasotugasez.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/nutogugikufelunoporezame.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/ludusexotijogekomo.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/68305585955.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/xobibejimotasomulotuv.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/71029182509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=queen%27s+lady+in+waitingPDF link annotation

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