Malicious PDF — malware analysis report

Static analysis result for SHA-256 2607e0c6950b3a79…

MALICIOUS

PDF

59.5 KB Created: 2021-09-24 18:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 85904be2fa637a95f05a1f970c30f2e5 SHA-1: e8863f52aaed2795f471369b7acf0449294b791e SHA-256: 2607e0c6950b3a79de5526bda47dde0c3f2d3c062eade2b8947d17ccb284c43e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm, suggesting an attempt to drive traffic to potentially malicious destinations. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 https://laborke.ru/uplcv?utm_term=tr%C3%ACnh+duy%E1%BB%87t+web+nhanh+nh%E1%BA%A5t+cho+android PDF link annotation
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/52675334007.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4929f77d---wevetapigi.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/173806e4bf32658974260db7c2582d18/kenoluruwugizuzodanem.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/61387868874.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/92698419677.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/legizekelutukepamuwonom.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210919045311.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/revukimomukamovovon.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/91263229642.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/71170634979.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b5e53cd0b---70744994447.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/8376654253.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021092113250023.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/8201361499.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/76465338677.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/rikebilesujus.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/kaxide.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/44552443033.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/69186123504.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210916081140.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/redoligomeji.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/19610989003.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109190454525060.pdfIn PDF document text
    • https://2winit.com/Files/files/4626268230.pdfIn PDF document text

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