Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ece455eed69886e…

MALICIOUS

PDF

67.8 KB Created: 2021-09-06 03:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c51e0261d6ca44668e0e11a6b68f5456 SHA-1: 377794dd7324620262a6c187aab1e6f3ecfc1b33 SHA-256: 2ece455eed69886eb044e2c1ddfb824a06079afa15a1204328f9e0d841a635d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7252

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://ryokanclub.com/FileData/ckfinder/files/20210726_E997B071D0494E2C.pdf In PDF document text
    • http://duplisite.com/userfiles/file/67432091865.pdfIn PDF document text
    • http://zae.me/datafiles/file/dukunawi.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/11768096316.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ce142b802---rogojuv.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102acf36b53c---88470557852.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/xitulowabap.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/62447835980.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/17d8c778fbb46a658182052c8607c04e/kutufejifiboxe.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/74650540201.pdfIn PDF document text
    • http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/genegeraxi.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/63626125832.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/19988463572de02a9bcbac2e8590e607/4113739011.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e51833d25bb9946646a4202aaa0fc492/lugubupemamej.pdfIn PDF document text
    • http://builderall.info/userfiles/file/84793205247.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/fatiripexadakul.pdfIn PDF document text
    • http://envigest.cz/upload/file/suzivenezoputuworefo.pdfIn PDF document text
    • https://auto826.com/uploads/files/10209341876.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/vesome.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/bdd17ff8aa2e208516c1f9bd92cb8737/xurudositubomad.pdfIn PDF document text
    • http://elskenecologie.nl/files/jexogej.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/16762834711.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/34586552524.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/c385330168b18d8870c5cf2637b3e236/83327315188.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f61aac5f59a5642a70f622ebd9ece2b4/satovosebuzumodepito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=du+bellay+l%27olive+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 23020 bytes
SHA-256: d3d5110306fbbf1e77e493ef5131a86a88645998b2eb009808a3af9890cd4ff2

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