Malicious PDF — malware analysis report

Static analysis result for SHA-256 233a64afcc810bb2…

MALICIOUS

PDF

86.2 KB Created: 2021-06-12 22:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d8f4eb1674a4a224a1d260c5b550fa17 SHA-1: 334ed53c61c5ce5fd941fc5da6d3fa0d1e5834d2 SHA-256: 233a64afcc810bb216044cc270682475a4b9157b5ea7b3dd427f973696ea5537
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm for phishing or malware distribution. The document body, though heavily corrupted, contains references to 'Arcgis software tutorial pdf', indicating a lure to attract users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8245

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://ketchas.ru/uplcv?utm_term=arcgis+software+tutorial+pdf PDF link annotation
    • https://codecs.roimages/file/61955575465.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/cf80212add563c5c71184647941b8a7e/24773890227.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/nkl59eok1hee93k5jiteiibgqc/85158370154.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bccf35b37---nuwome.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/ec90a07bc36a1513b644c23efe154604/24401230831.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/nisuxefimutoguxewipunugol.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/u9o0c2o2ktg5glotehn6t2jvr9/6743031101.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/fukedametobinuniba.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/bi8c57cmrtfht4l6s5eofc6lkf/6115875687.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913924290d2---42398497754.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/regufugijibunijemagufen.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/gotumefitigunetojutawufo.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/0b83647552a4921e3194f30b72a0f314/jidesibezaken.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853ce811dfc---webifibidagipipimedo.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf3aab9a5d---77035574593.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ek2j56ar9d713coavu4umhnf2o/63972772745.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B4 5404 bytes
SHA-256: 4452001998931942c9debde72c49b928b44c49e1da93fa0babe05b9abd88e206

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