Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bdf06aa8abeea3…

MALICIOUS

PDF

48.0 KB Created: 2021-08-04 01:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 00758717f6321768b74a450197690564 SHA-1: f23fce663ba2e3f28884573ecd72fe8cf2b28768 SHA-256: a6bdf06aa8abeea3cb05881748e3803bcb52f7423884c4c337140f3cfb327cdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to disposable hosting and compromised CMS upload storage, indicating a link farm designed to redirect users to malicious sites. The primary purpose appears to be facilitating phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9166

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://chcial.ru/uplcv?utm_term=e89382+hannstar+j+mv-4+94v-0+bios+vinafix PDF link annotation
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/widigovarogikarofuvi.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/86a7ec78317fa2a4bbf836bde824e6d2/86689817780.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/cccd2b62c33412acbfdb50ba74e9512a/99669620775.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/daribajugesujibefufi.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/25050705790.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210709143620.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/99260656383.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/br26g5fpu030utcc8da02ke6b6/36236448327.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/kakigoletasesakatalowag.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/j45hjvnamlpbpm1aoj5f8kh1h2/73337094728.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/39231575612.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/jagotanekoluvusugev.pdfIn PDF document text
    • https://go2germany.ru/files/file/xarafigipirix.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/1755682777.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d53848d5ad6---70839932133.pdfIn PDF document text
    • http://artside.org/data/temp/file/21416747505.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/limolasatal.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/6e1cd5f9a5ebd112b43fed7bc4f16e70/1159256997.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a1356489---budutupeju.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a40bc6ed32---lakuvizaxugefobevol.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/66386592382.pdfIn PDF document text

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