Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df82b3e2d17c8b5…

MALICIOUS

PDF

68.5 KB Created: 2021-07-25 18:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 73edf3947133d86e0287d8e591a8dcd4 SHA-1: 2c29903dff5e9b59e920bb7f4d98bf2990104af6 SHA-256: 3df82b3e2d17c8b55437335dd56222a141529698c06f7160dfa61a938d389ea2
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, which are common tactics for phishing or malware distribution. The presence of external URIs and link farm heuristics strongly suggests this document is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

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 http://xn--dlek-5qa.com/admin/UserFiles/file/53756040053.pdf In PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/61354679046.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7e6d7231e---bojopukox.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/tuwomalezomate.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/1424970e35131fa035b484f5833243a2/gojorurajetobumewesesaki.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/danedoletusugusifatag.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/nawovevirimuzu.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/49825930819.pdfIn PDF document text
    • http://www.zima.snowcat.pl/admin/ckfinder/userfiles/files/sorokulabevadefoxi.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c429fcf3be---82322184998.pdfIn PDF document text
    • http://yejida.com/userfiles/file/xufabamopelokejesi.pdfIn PDF document text
    • http://teplospectr.ru/images/files/rifoxirapewofudufoniwet.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cb166a08d85---tegud.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/69fa4e75aeaa0f7afa5b0428490c5a3f/sulelil.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/77237412958.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/31670245675.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/ralobobiwosiwutud.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/jogov.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/zisativinejelefiziniwu.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878d9b9f714---69491183258.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/87849709639.pdfIn PDF document text
    • http://aimic.com/userfiles/file/patolepobizuvinufujimes.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/90031410619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=toshiba+satellite+l755+battery+price+in+pakistanPDF link annotation

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