Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8dc97e452f67afe…

MALICIOUS

PDF

47.7 KB Created: 2021-09-25 07:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 50e2ff7b2a05d03a4b0e0a1c32a77344 SHA-1: 7e558e7c023157caf5f62063800bad4559c7d7a8 SHA-256: b8dc97e452f67afeaf67cba0a4e3b844bad3eb421fc7e71aec1f3a6e1ca5736d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, several of which are identified as compromised WordPress uploads, suggesting an attempt to obscure the final destination or leverage compromised infrastructure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5801

Heuristics 6

  • 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.
  • 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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/122ac38bc1769117ec6947f25ef5f855/vamijovilojaxujekasofe.pdf In PDF document text
    • http://saltokisport.com/uploads/files/75721169343.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614507557d9af---rowide.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/xujuliginakomefuf.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/5621959732.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/damamamuri.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/78215178123.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/wulomemukof.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/95868365798.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/44483249690.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614591c8b1c23---92169316530.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/gixozigifejetu.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161477101bee85---95737582615.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/bidubajunijewuv.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/pukadesanegasuxerelevipi.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/96728532300.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/16054134059.pdfIn PDF document text
    • http://kaie.org/userfiles/file/20210925061554.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/gejidubusegifowenuboma.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/83172835987.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/13233690793.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/daxadejomuxexafagabudozed.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/mamivuxalun.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/bitapawi.pdfIn PDF document text
    • http://cdjuchuan.com/upload/files/sujumaguwaw.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/89061404201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ce5+protocol+apkPDF link annotation

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