Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba331d27fe82ebc5…

MALICIOUS

PDF

47.7 KB Created: 2021-09-13 12:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 157d9b35b2512a140da93d55d5dd5074 SHA-1: 56137707b4d47a914f09bca32a6736e758307dca SHA-256: ba331d27fe82ebc5bc24249e227f955a1f0fdd889b9b5822fff9d02695ec1bff
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. This pattern is commonly used to distribute phishing content or redirect users to malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5740

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://pabxlg.com/userfiles/file/82999109953.pdf In PDF document text
    • http://oletrans.sk/editor_uploads/files/36476572642.pdfIn PDF document text
    • https://limadelimon.com/images/file/17878453428.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/40578761465.pdfIn PDF document text
    • https://riwg.in/userfiles/file/33581075772.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/16071770497.pdfIn PDF document text
    • https://12shio3.com/contents/files/92195268461.pdfIn PDF document text
    • http://sro52.ru/uploads/files/41331106516.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/wakedukolomekofer.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/39057261707.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/rofojifanefazupemovax.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/85445778811.pdfIn PDF document text
    • http://jfe.hk/userfiles/wetuxubetul.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332b4fd2624---jaxazobo.pdfIn PDF document text
    • http://domplus.su/userfiles/files/lakujunurefef.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135db4ed200f---temebojekoxigiwivexoz.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133c897b66f1---vadufadidobevodosew.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jclock861afkaruif2ge8uf2o2/18704390274.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/rezufolepurabevewidamor.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/84224000601.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109131522341103.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/24e5e7d39748f6532b179018163830e2/54015749267.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/naloputitakimi.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f0da295928afab5aae610bcb29ccfe9f/59672093582.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c37d3861a---30888442105.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/60109308026.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc6e76a662---zawadone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=krish+game+apkPDF link annotation

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