Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9af2605195c0d7…

MALICIOUS

PDF

59.4 KB Created: 2021-09-16 14:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a411211615c4ddcac716501a62d1fe5b SHA-1: 2f69e4d7beb5135a0f8a6cfae489ab4bd044d7af SHA-256: 5e9af2605195c0d7e9ff181c2a3ee418288c2f2ecbd8ecbaced79b3f984b9983
162 Risk Score

Malware Insights

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

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. Several heuristics indicate the PDF is part of a link farm, with many URLs pointing to external resources, some of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8763

Heuristics 6

  • 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.
  • 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://laarakkers.com/ckfinder/userfiles/files/14520867697.pdf In PDF document text
    • https://dadrarad.ro/userfiles/file/180103831.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202195951202478.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/2e921eb0b2f8a9d644708071852178c6/27245396110.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/22926397257.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/430543236.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/91064604058.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/lewetobawaboxibitamo.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/ditidivasabad.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/nunezi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dabed17c5---jukiwunotuji.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/roxajixakinexav.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/78399583282.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/xijixis.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/vonavudaveromumujadofaf.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/070736491136.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/93942224937.pdfIn PDF document text
    • http://vejwun.cz/images/4515331149.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303ed2db981---futuzo.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/37904686371.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/25933293413.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/kivitetos.pdfIn PDF document text
    • http://schturman.ru/files/files/28989568422.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/gbpsu5vpqesjepdj5dhjtf93k5/jobonewulaxegase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=speakout+elementary+teacher%27s+book+pdf+free+downloadPDF link annotation

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