Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f737938e69834d…

MALICIOUS

PDF

58.9 KB Created: 2021-06-04 06:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7442e9d3239c2e4f090eee304ab0f5b SHA-1: ca05f9d2fe06940eeef39ff0474348aeb5fab67f SHA-256: b8f737938e69834dd4aec45f2e50703e7fd41474559581ed020c2ff39b17c8a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though partially corrupted, contains a lure related to downloading Spotify music, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7320

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://kermoulin.com/userfiles/file/5183081289.pdf
    • http://www.yoko-ono.be/images/userfiles/file/jided.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ec1789bb2---68792456403.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91ec4edc1---dasojunawulezurome.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae5332d33---67325650417.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/de5ouk40ffl1e7mvb1bb8fnp7a/44927941127.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d15132371a7076565e131e1c9919f8f1/zojifizosekedotome.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dd4f93224---40189059206.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/491da4cc1a1e518b88846f9f9c487fed/7877148552.pdf
    • http://ibtaker.ps/userfiles/file/bemifafosujosuwig.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/toh44k9use6perb7l50n9m2cq0/22782186319.pdf
    • http://bioscipublisher.com/files/upfiles/file/zetekebedegomegeradolu.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609846153f363---tifosifuwi.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/vae0j7drq3rqkdk28aak4c6lt2/kebefusebogonujazoseg.pdf
    • https://businesslife.com/content/file/82393547916.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b569f5296ec---xigomiduderi.pdf
    • http://meteosputnik.ru/userfiles/file/ravevodaza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+download+music+from+spotify+using+cellular+data

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