Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee1373db9d6a5e…

MALICIOUS

PDF

69.8 KB Created: 2021-06-28 00:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 016a222191b2b33747c3efc891ea02d7 SHA-1: e14770e1306f5bcb50689156eb62deee23738a0d SHA-256: 51ee1373db9d6a5e93ed1b14bf66772b4ab8530af88e19c1ec4e98e43e63815d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, specifically leveraging WordPress upload directories. These links are likely used to host phishing content or further malware stages, indicating a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7018

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://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ff1a7153200ed0a3c6eb99034cd4980b/90157960152.pdf In PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/496e6687662da10e64e1a06c9feffc99/xenedagozonovoxin.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/invnrnitqnpg1b0m5g70dom190/foxijakakidokirutilemesat.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091f92c4b14f---27838063662.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbffd879e---pajejazowi.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6f6aa1cd806e92284f1a0b4fd5fea14a/28096741701.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/nutetanumegerosogexisis.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/gazinefujaga.pdfIn PDF document text
    • https://tappowine.com/file/34337603183.pdfIn PDF document text
    • http://debden.org/userfiles/file/90122180576.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/japunikanifug.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/cfc61bb8c142d039e4b25151b617e7d7/kesanidiv.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e618099de7---32632849356.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/07b79a45be20852082ba2d4d2070c51b/82557882993.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/4l2dl613h694dsct8e78rmr34s/pemenimejirezofajirasovu.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08c5813c75---rofujivujagejeropakigu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2e523d000---losuxuwuraburugopinexumav.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/sinenugexadaxovemuzujuvet.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/146e8700e21bf37df628682a6d0035f6/terexalitiwotolegonab.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/29033b72eca92fda320ba54f7b240e06/funogizewebujowidomibas.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f227251064---84980229641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=determinants+of+supply+and+demandPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.