Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c7143e96b63e75…

MALICIOUS

PDF

52.1 KB Created: 2021-09-01 00:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff00b508b831c38b847e3af92c3b5c8e SHA-1: b60fcf8d6574a6666b057702ee6adf5735ae7374 SHA-256: f7c7143e96b63e75b584f59f6cec7febed70757b1930a43152687ff20eb7ca12
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are part of a link farm designed to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7887

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608de980da36e---fowiberafasubag.pdf In PDF document text
    • https://maturana.cl/upload/file/60397873775.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/59261837797.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/dutegoxonomadapirudamijix.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/refavezitarateta.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cde13e9c---67865487204.pdfIn PDF document text
    • http://tochuchoinghi.org/files/regofofikagenokawajub.pdfIn PDF document text
    • https://postelezmasivu-plzen.cz/ckfinder/userfiles/files/wosenasonovekij.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210716_DE64EEBA68D9B210.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/bfb71bc9a70887807522ea3b10af56d9/45311012321.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/gotubegutuludafomakudur.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/38435980525.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/51447606491.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2372sbhqahct03sjtv93fjodme/mifit.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/jazosevakabunusi.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a045c6a5fbd---48143951094.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d7cfc8262---22776991541.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759b21ecf88---bivonaruloraraburufoxev.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f60fc647fea---xikadunepipelutubex.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/61165081340.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecec862fe41---resalinekedizoxika.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/7ffa207c90aa274e1fdc85551bfbc70e/vexataxadaxole.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=chris+eubank+simply+the+bestPDF link annotation

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