Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d61dddb81e97f5…

MALICIOUS

PDF

66.5 KB Created: 2021-09-15 12:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 181b09a2989ab649338245124a92b484 SHA-1: 5cbd073641549828a4604342a4cd651f6a03aaaf SHA-256: f3d61dddb81e97f51f925b24d177b45e812ff761b64c020a59561341db82e79d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm, likely for SEO manipulation or to host further malicious files. The ClamAV detection confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4667

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nhatngudongkinh.com/upload/ckupload/files/konototoxototamok.pdf In PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/bufonuzorafinaravoginoken.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/24343508091.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/kesumifavewiwekatarisim.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613169530f1b8---11637710858.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-14/20210914015512114297.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210904_6B47AC53FC298CF8.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/50588686058.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/8122715819.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/tetikesej.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/gutugulagituzezogazutomo.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/rasokokeforanuni.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/84686095872.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fcfcc2bac---1717879195.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/31282820478.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/wajabenimibobafugifanuzan.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/wuxinirivukak.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/fujokumadajifapozozenives.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/funamipa.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///tubakifosolina.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/pijexozekabedobaviji.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/62425760579.pdfIn PDF document text
    • http://vswet.ru/f/90377548048.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/97404477401.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/zabolumejobapufig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wrong+turn+2+download+in+tamilPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/11648748584.pdfIn PDF document text

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