Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b86a457ec703162…

MALICIOUS

PDF

90.1 KB Created: 2021-09-17 11:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f4482887891cd9f88acfc9740a50e79b SHA-1: 38439012bc4c5f49d2187f36112bc4fcb588e01b SHA-256: 5b86a457ec70316246b90076ccf8106311b47f504975b002f911534fa5550b09
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5681

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
  • 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://wastran.ru/uplcv?utm_term=miui+12+redmi+8a+global PDF link annotation
    • http://ylplj.com/ckfinder/userfiles/files/43543397810.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/15406573486.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/96643994890.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/63941080824.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/beruxaroravonutaso.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/95040351420.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/8256763445.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/59822707503.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/tunime.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/lamuzolafakulidide.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/lumelifipogab.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/weforupod.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/pegipofe.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/15121867580.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613042e9efd83---supuvudijago.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8397565c372c6e9cfe7346fa33ab48d5/wivorejemipitu.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/54004587235.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/85031345680.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/22754955185.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/dekanimuxiwam.pdfIn PDF document text
    • http://b2cdemo.tickets.com/content/files/43399237393.pdfIn PDF document text