Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d15d2d518177be…

MALICIOUS

PDF

73.5 KB Created: 2021-08-20 23:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb5e7bfd9af56bfb16630082d579ebed SHA-1: cd456320452a59df918f97b2b1a963ab4f3f0c2e SHA-256: 82d15d2d518177beb4cb778cdcba7336984cb7ea0d9292957777efdd3e83e563
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The primary purpose appears to be to lure users to potentially malicious websites through a collection of disguised PDF links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9603

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://inwebjor.ru/uplcv?utm_term=comparative+and+superlative+forms+of+adjectives+and+adverbs PDF link annotation
    • http://doo-san.com/userfiles/file/20210623034631.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3cfa9b999---57860746438.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/jiwiwilerozesatebopugeto.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/24203911345.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/nubawevojutexefur.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/12650675007.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/65189927308.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8116ad74114f9bab8c4024c2542d0d5/99270322047.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/n5nreeq0mul00hc18p1ms9f6hf/55930130015.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/94032434175.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/ac04f82704bea029a33e07f2b74d76c9/vuxoje.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/68f090e05acb7e37ba031534888ff886/48045596160.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/476602600.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/75415718458.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/xegasilagafejepamaxi.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/11981011866.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160731aace7be9---xewum.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zupovepajefoni.pdfIn PDF document text
    • https://bachson.net/upload/file/doverikabog.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/loraduvi.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/71843867302.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077deb4ed79b---duxitim.pdfIn PDF document text

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