Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec9f060e381d2ea…

MALICIOUS

PDF

48.0 KB Created: 2021-09-14 01:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb5174771eb2cd98735fbb17821c700a SHA-1: e79803615c44ee1af1d1e6e7cf7aac383f676d09 SHA-256: 4ec9f060e381d2eaa6e793f807899cf0f24284e495e687b246f80bf16c04599b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a link farm pointing to multiple compromised and disposable domains, suggesting an attempt to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

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 http://sportingclubalbinia.eu/userfiles/files/tovumefugobinatupatuw.pdf In PDF document text
    • http://schokoladenbrunnen.de/idata/regivubefujujawuguvijewux.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/44180612573.pdfIn PDF document text
    • http://mutitar.com/user_img/files/53795896655.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/nareduzuxajemesaziwi.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/lojur.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/tupiguwavikowugefosuvi.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/55814387337.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/nolemurugelijek.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/lelaxa.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/6857074907.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/59065780879.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f60eb5520d---fowud.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/10141938167.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/doxabajadu.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/n43o7ssta2s0g87a1ju8anrbq5/mosawokafefubugojeloz.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/73009759778.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/53883987304.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc063bab49---gugelozizoxo.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/zilogorumasibubutetexuke.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344fac20b7d---58830648506.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/pasumeloxobavo.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/mezipiguranepe.pdfIn PDF document text
    • http://quetthe.com/upload/files/ripogubusutelatezurovilap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=justice+legend+full+moviePDF link annotation

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