Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ac90622db35017…

MALICIOUS

PDF

58.6 KB Created: 2021-09-20 12:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 968e658d6443d628c6d45dbbf410fd9d SHA-1: 4c607b743f3c56640e704d54b791ea01a527b939 SHA-256: 21ac90622db3501752086c5f830381139b2ff9ca090293d3e11688561e5f26ae
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, indicating an attempt to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for initiating the redirection or payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

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://laborke.ru/uplcv?utm_term=apps+para+crear+musica+android PDF link annotation
    • https://mycocoa.org/images/upload/files/tusaxu.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/riviposipagafesodefow.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/58400226447.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/sisisuwoguzobi.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/dd7ef19d8f16843166308fb51f5bda11/45345724902.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/totetakapowoxupumetol.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/2824315922.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/xawekesowabofolurosivezap.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/15068930968.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/22645647829.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4503f3f5b---fafunujeludivijebufura.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210902160514.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/12948508502.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/nurebedowezutekis.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/010627318312.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/80542709422.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/gulidon.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/62266914370.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/43332621506.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/42057584354.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109190425224550.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/61028464770.pdfIn PDF document text