Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f1e6a4c3206859…

MALICIOUS

PDF

101.3 KB Created: 2021-06-25 08:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3e9f5e17f71d4f0443800a2a01f509ea SHA-1: 8a054ec1cacf8cd9d6415ed9c02e44841122574d SHA-256: b5f1e6a4c3206859a7338cd960508eb85b01e059b089b5495da5f90bf8525198
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting domains, disguised with search engine optimized terms like 'Sony a3000 camera manual'. This suggests the primary goal is to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9545

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://laborke.ru/uplcv?utm_term=sony+a3000+camera+manual PDF link annotation
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc7be88c82---xiluguvekudogas.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082f9671b0b0---pukuxujimogofuruwuzizufar.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/sakogukukuredigibi.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/nixizeki.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/76820821325.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/050a1d22d621feb60c1e16262c16d553/mozuwutorariralelenujubo.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42a190edcd---soxizebijepenirin.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/660ecbdf181f733a0f1900ed67e07cbd/90845621030.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/38842189666.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/c0d211f013109e47562a1562aa846ecc/mimogonuluzegebajewedona.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/30969827262.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/wibisokede.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4137e78f23f80d6c8e3345f6f15da1b1/35149193628.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094646865dab---55599672831.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a49999d356c---kepowovamuletosafepi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f8c178ff---3345291727.pdfIn PDF document text

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