Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cad80e49b8cb3f…

MALICIOUS

PDF

122.1 KB Created: 2021-09-10 08:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 536d65f7e1ce080f5ca32e11cf18e85d SHA-1: a21d53b56df640ce7c4be12970f6f678fcb8d728 SHA-256: a7cad80e49b8cb3f74e21f09cf5b7ae61a714c025f3f8f40480ccc8bcfac65b2
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7537

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 http://dalnoboy.org/data/filestorage/upload/files/relagoxiba.pdf In PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/27056608645.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/28858512064.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/70487962971.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/suwelorovebimomijutepop.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/34844809b7be36a0962311a38f28b554/togin.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/29136594309.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/12103399351.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///15099005018.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/foloba.pdfIn PDF document text
    • https://priscar.com/documents/files/94424021132.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/58577816593.pdfIn PDF document text
    • https://artenika.pl/fck/file/24850462972.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/didojiseluvov.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/140648430.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132da2092447---34421010108.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/34502785443.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/mobalesitaperekusiparinaw.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/41081615348.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/momobunamolus.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/60307571165.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/fasixuwomezosonav.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/72538152474.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/lisizavoxivilojisigel.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/xurizavoxaravonevenab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+permanently+change+rotation+of+pdfPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/81081773001.pdfIn PDF document text

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