Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0f44f8ad564ee7…

MALICIOUS

PDF

48.0 KB Created: 2021-06-13 18:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bf99401e78051053a35b083ef1272b06 SHA-1: 4574ae66ab0a1db84969c9b5c0741325855296f4 SHA-256: 4d0f44f8ad564ee75d71b9d3b77abfc8ffb0fa7eba1c1ef54cdee02349a7c4f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm, directing users to multiple external URLs hosted on potentially compromised websites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with the ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a phishing or malware distribution attempt. The document body is heavily obfuscated and appears to be non-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7228

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
  • 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://garglob.ru/uplcv?utm_term=what+does+a+cubic+centimeter+look+like PDF link annotation
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/8de2pq1csupr390hepi8cmfao8/galisutepuxifukini.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/66497603497.pdfIn PDF document text
    • https://angkagenap.com/contents//files/lizugatatudubusejozikul.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/i0hmgtc1eed1om3tj822jjaav0/97309688517.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/403107861585b51dfbb096f1c1ffa1ef/94127002145.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6629215a53ca88096ad4bfc158f7c7cd/50366788994.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ef636047---masat.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2d249899bf96a295459e9d0955f58c36/4704852969.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c339be13f20---74518877103.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a6bbaf85e17ea213c416f842fa228ec8/devurafiko.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be327a85f0b---rududelusajovimosi.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c533b20f226---fujufozosilu.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/votinutefibinifa.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/83601893473.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4644e9c7b---82158083373.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607757749ec40---16608023912.pdfIn PDF document text

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