Malicious PDF — malware analysis report

Static analysis result for SHA-256 8321d154b0a9224a…

MALICIOUS

PDF

69.3 KB Created: 2021-09-21 13:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: c5155cc0737038725ad4be46a38fbb4e SHA-1: 3a2b9fb906ba0d84d0fdaf6015d711fe97d5e37d SHA-256: 8321d154b0a9224a6ffdaa814e21f60adbfca01e0df50f59c72f5261fceff13c
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6468

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 http://evolution-dev.com/file_media/file_image/file/43925188167.pdf In PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/1925619095.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f764d35a4e735c812412f77669d94ad/90962386016.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/pasafotirutul.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/xagevorudiwewugepobif.pdfIn PDF document text
    • https://tdfstore.it/file/17146412561.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/tonopavaforuger.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/0ffbb1e5b3378450a5cbaf998c444a1a/xepafim.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/67776622222.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161425d867e2e6---31807171012.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/xinegenobexefof.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/54649931492.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/fusetibugekoneg.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/42316523646.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/kopekefezowupipufud.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/gixesow.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/58944785705.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/juvotadu.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/telujoseduf.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/49385183415.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/70690947704.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/lujugetasaladurolokiraw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pubg+mobile+x86PDF link annotation

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