Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbff8dfb80061f21…

MALICIOUS

PDF

54.7 KB Created: 2021-09-03 13:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0edd013404ce5f5b3d25103b6254b034 SHA-1: 29f9d14846473f6c1ffc08c34ce0827cdd5c59dc SHA-256: dbff8dfb80061f21c6fef23782bab9fda25e711384ee160f8d2a66264506742f
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable domains, a common tactic for phishing or distributing further malware. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of numerous links on potentially compromised or disposable hosting indicates an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lmcmanager.com/ckfinder/userfiles/files/vepemavubugokosazijewum.pdf In PDF document text
    • https://rabudiagnostic.com/userfiles/files/safurajogukapusib.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aea354713---90942196685.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/kiwogezimeveteko.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/79539932955.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083785b17120---55157003505.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/logokeb.pdfIn PDF document text
    • http://anupbolivia.com/images/files/davarifonebolakus.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/22490691299.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/moturexukejigigowigapi.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/texus.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/tabivekive.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/fa3801b7b19d1eb680f9b904a5ab0203/latimesopexajuvakij.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/59d159c4489b37cb1fd7e0f0bad9ca4c/3464950784.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/fizodinalelubenor.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/7rhhpfsdtoddae3l2oknbqgf8s/wadaloza.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/f8jk7v104okm7rbiupctq46da3/92322301932.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/nibevisitimarili.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-18/20210718122843386020.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc5f865603---65561078633.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/a5799c06991e870e24fd3460e14f0b93/wisubutojekujetir.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/totozewuxu.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607145f84fdb8---12943204332.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/24443564572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=chinese+new+year+preschool+worksheetsPDF link annotation

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