Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5143bed076569e…

MALICIOUS

PDF

58.2 KB Created: 2021-09-06 12:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ae114daf1f7ccb68b269bdf36db676e6 SHA-1: 041f95b4a4b4cf0f725932822ab42dba5c3b7f66 SHA-256: 2b5143bed076569e51464bdfaf407669df8a73389b6e99718f5002859ac3b996
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and other PDF files, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the embedded URLs and heuristic firings point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7666

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://beytarimcilik.com/admin/editor_resim/file/77803557022.pdf In PDF document text
    • http://industrialdevices.in/uploads/nevelafofedipuv.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6be5bc1384---67247920310.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca51108f79---sezigubudakozokinalanuper.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/tomilasomuworarogijogune.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///55747055326.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/34683392882.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612953cc66ac7---bidogabaximare.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/xezelosiludinujaf.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fociiqmg360v7j16ufaqq62l1g/nusetubiratizikote.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/93d99d79b7838bcc8b5c52ded9e7e0cd/3235716762.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f534c84d6---savifefafipatokufer.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fa37afe46bf---goriv.pdfIn PDF document text
    • http://azizolace.cz/images/file/94246706879.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074341a626b5---jiwamogenotekanadajokeme.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/buzoleluvoxovanikawugizes.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/rodunamo.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/saxogovabirimodotode.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/xedadovekodizaw.pdfIn PDF document text
    • http://4bx.pl/public/file/61389731513.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8ab56d872---wegovinejunotujuvaso.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/15f5d24c80904bb2cecc0d5670cb0cdf/31948357691.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/noligejepamekemog.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/6183363462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=online+examination+system+project+in+php+documentation+pdfPDF link annotation

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