Malicious PDF — malware analysis report

Static analysis result for SHA-256 184b891efa10d736…

MALICIOUS

PDF

62.3 KB Created: 2021-08-02 13:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 32997e1ca13b6751533ed915e9f65705 SHA-1: f908979c6448b34905f5690b2552a5e07cb2b63f SHA-256: 184b891efa10d7368e22dd38937a7e114bcf2e300a7920e40c0767f7395ff4df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9554

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://allytemp.ru/uplcv?utm_term=operaciones+de+funciones+ejercicios+resueltos+pdf PDF link annotation
    • http://paradisoseminatrici.it/userfiles/files/naworanufewajaja.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/fa3be97a0db677e8483cb5e9ce83c152/loxuvolirupigabimadigaxir.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075023f2bc2d---17950681827.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6cb712064---kasipexa.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d568dd95250---42188059829.pdfIn PDF document text
    • http://nenorm.com/files/files/25555499975.pdfIn PDF document text
    • https://soechi.net/userfiles/file/zigeweroxutej.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16200176282192.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad709da21f3---kalesesutewurupovelolaxom.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/89111018144.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///66776649617.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/59159091055.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083ae7dd285f---39690356484.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabcbf86724---nelovefixefuza.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3465b05c27b6c550069379f9a5465b03/14799144615.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/eadedb0f427c321595bbbd04fbc49eee/kusupadetapolekezojunoxev.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/muriwego.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/fupijijeruvowepoteb.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63f639d6b8---vemonofolaxilujo.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/11261095440.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21b4866d20---pebopapa.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/tughid0n92s5a3lr3mf2qs4r5l/ramasaweberekoxetotavejex.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46906144279.pdfIn PDF document text

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