Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f3d58c3dbb96e5…

MALICIOUS

PDF

64.0 KB Created: 2021-06-22 14:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 565bf405778b4b4e7603b9aaa0a791ba SHA-1: 84ebfb91c7190b2611d086ec85baa0a1f3d55eae SHA-256: 45f3d58c3dbb96e5761e9c33871f7fbc63c14d44ffeec15abae521fbec033e2a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file is identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The document body, though obfuscated, suggests a lure related to 'physical science chapter 7 review answer key' to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7442

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://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/kuluxomevovepimewufu.pdf In PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/cliqa0nc9q59hoq6f4ll06k8fo/wamatomekatepowinenuse.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/juwalenavirutexejejejako.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/mg8lkeo78hin4lk0c0qf8rhvn2/jubogazurejofikupe.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072f91463cec---88999346358.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/7668026527.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a54e2c9ebf34e5487332ece10139457b/nitub.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/lesujusagoperode.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/8792f4985831325b5d595b6d7ca760b6/fipudasenegaguvolunejija.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/8735606188.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a77e70b014e---noxurelofuwajuked.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d05476505---40419397606.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160747a9b9e784---kefafoxuxujakina.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b205c16e1---59329962369.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-13/20210613041658368229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=physical+science+chapter+7+review+answer+keyPDF link annotation

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