Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fef71270d1fef26…

MALICIOUS

PDF

57.1 KB Created: 2021-06-03 02:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42126d96ff8a23d8a7ead329c3c8c347 SHA-1: 218f3e43d5b7820285cbad19cd4cb57ba8dbb5a5 SHA-256: 2fef71270d1fef26b76c91156bb4947db2bd6642579c76ab5baa194b359f1bce
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=vocabulary+builder+early+humans+and+the+agricultural+revolution+answer+key', suggest a lure to trick users into visiting these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7659

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://wastran.ru/uplcv?utm_term=vocabulary+builder+early+humans+and+the+agricultural+revolution+answer+key
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/a0mmsan0ffp2duf40dhmgi6fh2/mumesiganoxavumevep.pdf
    • http://darec.sk/files/files/26591072854.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e8c8a15c517638243f765fd01e761f19/mozumu.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/e56317523148ba599b91329669bad474/25283856185.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/5bd9d8ffffc6d17dba036a70f30616d2/guronolepugiranasagero.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085d65e2ae2d---57953081072.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/8041gd9nib7obut4binrgbn25e/bexuxaramuxaxodevo.pdf
    • https://abugfreemind.com/userfiles/file/29492890268.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/g437n3ef7nu2e0dmv43c7lgpa0/rumatepoxon.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8c88h8qplooaa6ag79ts8pbbhd/sojijukexirij.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd05c99f1---53511712943.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089145d18a06---32386605569.pdf
    • http://rld-carbon.ru/file/paxes.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61316e7e9b---66762021775.pdf
    • http://simonide.org/userfiles/file/40344522008.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3a91c16c---95681389903.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609da3045396a---lewokirol.pdf

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