Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ceb1063bd22ea50…

MALICIOUS

PDF

50.4 KB Created: 2021-09-12 15:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a7c44c62b2ef213fc7bdab8fbf0c9da6 SHA-1: 86b9ee114d3a628cc27f4991a3848ff0918354e1 SHA-256: 1ceb1063bd22ea507d4fecea7a9738185b7abf5b481c4622df73afe873981bdc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous external URLs, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, pointing to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7181

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 https://medvor.ru/uplcv?utm_term=fear+twd+torrent PDF link annotation
    • http://kleinschadenexpert.com/userfiles/file/vutisobafodag.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b480bca7caa07e8186d8807e9c089287/nimuladelazolatamapajo.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/84386575257.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/jabikifaseb.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/52839486470.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/gazekibigemiba.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/zusomapuwas.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/7039490687.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/legodilani.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/ee2c58441a8ecda47d4e3a9de55722de/valatexexijamijekaxakorar.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/4790232176.pdfIn PDF document text
    • http://sb-78.ru/files/file/64257971693.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/lilikigutajuwutifupinajez.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/xorususawekezasola.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a80ee54b7---25317853731.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/12798615590.pdfIn PDF document text
    • https://lazerom.pro/media/file/88047832638.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/tobabales.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329bad76e20---93818611548.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26466770408.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613395bca4dca---zosatapawubikemitumen.pdfIn PDF document text

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