Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e79f3db08e1564…

MALICIOUS

PDF

48.0 KB Created: 2021-06-27 09:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7bcd079461496a10b9ce81e197dd0b6a SHA-1: f5cb0f0162b803ec0eb07255aa39352142275ff8 SHA-256: a3e79f3db08e156415ecf8fc8ad4014abdcc75dee21913e01231199945c6f9d6
154 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The primary intent appears to be facilitating phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7378

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://readandenjoy.ae/userfiles/files/fepevinejalafovovoz.pdf In PDF document text
    • http://liburnia.pl/userfiles/file/fibajawopisojutoku.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbae8190c8d---19582702950.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1b839501f---lijanota.pdfIn PDF document text
    • http://nfc.soo.jp/file/53509658659.pdfIn PDF document text
    • https://invest.pl/userfiles/file/2026211491.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16070e76fd176a---56212037658.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160869201d5ee6---ludisaragepuge.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/19fc7f7ab91265b51bde6be6c5072104/bosigibetiraxezov.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///25568317740.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/21753948515.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/dac8069b9461f454ea8d7a5ed45c5434/47911683751.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a5156828---30429749506.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/800106877.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e788bb5d8f---fetipegez.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/b27a205ee373d956923f59d80192488d/sigibonarelod.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/jbte7fbinqateohshjrmbf7th2/xejisufuwumufexi.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/96324415995.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/5f58b535894bbfc7efba3852e681c4a6/74562096424.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/096k0rh3vrc22bkjkgmfvgqt5j/77657305744.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609da13452648---witokekesux.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/i0ti9p9nb4beigv47hlm6neh3o/75230259506.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/xomukipuxidabanutiwifok.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/44409943804.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/1de073f0e4e4b6a40511d352a19b5e86/94710377380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+does+broad+meanPDF link annotation

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