Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23e1965e825c9df…

MALICIOUS

PDF

60.9 KB Created: 2021-07-02 11:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ed838af582c379f2b87245c7315fd005 SHA-1: 2b1291473e2e93ceef20ffd4ab20e381355d1500 SHA-256: b23e1965e825c9df2a3ceb3b85274eaaf3558015037512af2adfc5baf9b03318
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple URLs hosted on compromised WordPress sites and disposable domains. These links are likely used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6988

Heuristics 5

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=some+assembly+required+buffy PDF link annotation
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076044608b9f---babezotudu.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/89539671090.pdfIn PDF document text
    • http://gpn1971.org/clients/a/a2/a25689677492d603657f1241a2a69ea8/File/95799526283.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/31895483353.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/14271102295.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/diloxopolokevewaw.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/90226729533.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/jkg8iltjtrvbnvoke7j3dgou8u/93673463593.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d88c8856ae---mapagoxolokinowisedusepe.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a4f677d84---16084176935.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/49922156517.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/sia03p20ceoqhp57dktfkn37cc/28506944359.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/pu8g7c55duahrjblm844l75n68/52150303890.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/39427066525.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/xawerinoxivogora.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/gedasavadexederaro.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/kolls281fe7n6pdquvlu56h6r7/59957504666.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854543f4057---danegufuxiwaxutuwog.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/38407453954.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/xikiwajaxataropakij.pdfIn PDF document text
    • http://janyska.home.pl/_mjanyska2013/fotki/file/91415268852.pdfIn PDF document text

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