Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c791d7fe6bb92ef…

MALICIOUS

PDF

64.0 KB Created: 2021-06-06 23:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb86c6cacb1db6f928e341c4ecdbd17 SHA-1: c5c04ec46a14a404c49a34e36a840c4fc9906bd8 SHA-256: 0c791d7fe6bb92ef64c5c60d16aed6ff97cfee80e47c9095c67ebda9687ee961
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations or disposable domains. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7422

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://krisoc.ru/uplcv?utm_term=grave+cleric+guide
    • http://ascensionchina.com/userfiles/file/94658041023.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/t1qq0dnq6e7heoqhpqrrg38bhr/wikikisiwul.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0fc65337f---famikubapati.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/b1fad34f56915799f572f862f43bef95/55994089943.pdf
    • http://citra.cl/userfiles/file/palunalelezepupa.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abc08b672f9---27149410646.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7327bfd0b---14272818992.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/643jk8d1a2e23b5frmlmhcuof2/20713895061.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160832fc7992b3---4012761450.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607090d39879a---jasutuwusuma.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/397f4066ad0628388430464da084f248/kixazixusaz.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076035896161---puxaxibikofufe.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2f0e1c1cea1fb45439f495f1e8932621/68931386676.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/jfk2p7shj88gdti6qnla5qrk92/wedivurovaledifetiwef.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b4c8a0fe046ad467b95ded68aba642a2/12439135248.pdf