Malicious PDF — malware analysis report

Static analysis result for SHA-256 414ad3b939ea2948…

MALICIOUS

PDF

48.0 KB Created: 2021-09-16 17:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: be203160990383a13484dfc49b0db82c SHA-1: 976cdb666e20d898c499f8a54e0a19abff40ccb2 SHA-256: 414ad3b939ea294849ee79d43ffeec48d88609e31f07e4f2299ff8387e3cef24
162 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, with many links pointing to compromised WordPress sites or disposable hosting. The presence of XFA forms and embedded URLs suggests an attempt to exploit PDF vulnerabilities or redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9210

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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://chcial.ru/uplcv?utm_term=juegos+metroidvania+para+android PDF link annotation
    • http://sabaparsian.com/ckeditor/files/files/69116797626.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/rirudosev.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cecd07ca8---kakugakifuvavikusezuno.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/69612532361.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/wadinemasinex.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/jerisigisovemowimufuwe.pdfIn PDF document text
    • http://wuchem.com/upload/files/jazevirobugonoxanulidu.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/vunuxu.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/lujijopujinajopu.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/purapipubetowivefu.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210908_124508.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/fegomume.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3d3b139cc---pomasitusenokitel.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/rutizemililijapo.pdfIn PDF document text
    • http://metallpress.ru/files/pawijijikilojulodufuf.pdfIn PDF document text
    • https://regenerateacademy.com/file/12924817705.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/winijogero.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/zuzakixixamorizuwixukena.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/964c6caea47f50fa3ed995217d461a0d/misonuxofujidobekoru.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/95578314233.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/bulaz.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/kifogod.pdfIn PDF document text

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