Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02b4b8efc034e8d…

MALICIOUS

PDF

62.3 KB Created: 2021-06-15 17:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8c38621ce548f72c95392dce3cf119aa SHA-1: 73c77639fd86a17322ddc4165e78982bf40535fa SHA-256: e02b4b8efc034e8d472f0674b6530914525dc971d343d718b8d320a69a2aa2a0
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6808

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://infrive.ru/uplcv?utm_term=danush+song+tamil+old PDF link annotation
    • http://anhuicrew.com/upload_fck/file/2021-5-17/20210517041104115997.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/1f492d69140599919798c41fbf35c42e/59314160037.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/robuw.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071110da9b3e---39812375273.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aba5324ba41---rerosixobegizubowur.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/015412d6247cb9519aa40ea72ca4d86a/vawevutipudutumopibesevu.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/notise.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd7fe50f8c---22101047341.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070045330f6d---vifitimaruteguturebovu.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b02b3f081---89732120583.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/fodegujezobiwigosigifi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160afbdf8e5c38---91550476886.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/mqre97m2rvk4kuck6o51nr0o0u/revipilozatinu.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cb8a598c6---15947997068.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/81457837345.pdfIn PDF document text

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