Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f2d20ddd437d61…

MALICIOUS

PDF

70.6 KB Created: 2021-06-14 12:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9a17456cd0015004e7e97657049c26d0 SHA-1: 528929b9692c1d7f3e7e15c886fb3536b2ef9e59 SHA-256: 84f2d20ddd437d61330f42e061b5cce1fdba011d7c81ce218b84494777aaca5f
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 a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9588

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://philabc.ru/uplcv?utm_term=free+fire+mod+apk+android PDF link annotation
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3b4cf3e62cb2a00b1a78a6a47702b07f/30311084381.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aebc96a867---narubulivatetate.pdfIn PDF document text
    • https://zahnersatz.pl/userfiles/files/72371169838.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084d2e1c433a---71673563885.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05556d1308---fiwiwufakubusamabaf.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/89bc459b936908d5e0eb9d5623f0fe40/39641788706.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210511094547.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/827b6b0603b477988f4c17ad675dbb2b/21107525121.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a1bbe58fed60eb0d3496d437435c7e6b/16486811585.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/49818333740.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608683883669a---vigekiditimoguru.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/21090602239.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/03de622f7ed13637623c1c053bad7a69/verawekofeximajuxexuj.pdfIn PDF document text
    • http://simonide.org/userfiles/file/69050731878.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075406629690---moworatorasuniv.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091ae189dc84---36982243542.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/pezariropekeboju.pdfIn PDF document text

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