Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86ada7864cdda91…

MALICIOUS

PDF

60.0 KB Created: 2021-08-11 08:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6fb66eb2fd960e574163dc32c343ac94 SHA-1: 49abe98b429de6ecc77686aaee4181bbb2bb464b SHA-256: e86ada7864cdda9154fb36f3dd176ae1bfd1e41a9e13e63545ef4097ce4e4829
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links, some pointing to compromised CMS upload storage and others on disposable hosting, indicating a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6031

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 http://cerezolorente.com/files/cerezolorente/_repo/file/sikonokuredipomosivep.pdf In PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/wuseso.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/suleretimomotupizotaditep.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/48582723477.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/24265033235.pdfIn PDF document text
    • http://ahchala.com/img/file/rivagaxuxud.pdfIn PDF document text
    • http://stolocatering.ca/clients/874514/File/jonalajopawowidozezoj.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/31843633966.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160882fddbcbde---roguzaxawulizanajap.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/6aab4cd182a94d627e45454af7b3eb35/rezaxujalonuludap.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2570eadd3---86254545456.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/cIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=krause+and+becker+paint+sprayer+reviewPDF link annotation

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