Malicious PDF — malware analysis report

Static analysis result for SHA-256 394b17e773ef47b8…

MALICIOUS

PDF

48.2 KB Created: 2021-09-08 17:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a690f333416b1fe4afea85065bb95722 SHA-1: eb53f813c668aef96f4f6b49b13e1a1753087a43 SHA-256: 394b17e773ef47b8def52cdf69e43b490366d4738c92617ca8170e8841bf6df5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7332

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b00f38091---67015243095.pdf In PDF document text
    • http://jmyhship.com/uploadfile/files/96961645762.pdfIn PDF document text
    • https://preciseenergygroup.com/media/90529259977.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/55694200741.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/govazenexasuturupizo.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/54119665415.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/dubijikanu.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/6405156973.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/buraxomibowewudopev.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/guralivawasavebulo.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/32731094862.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/50159323309.pdfIn PDF document text
    • https://aokman-drive.com/d/files/rejogoza.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/fedodamaxivimekaridedef.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/medufuviduvuboparot.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/vepazo.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5e4af993ab68f175d89d2114d1ba0358/16938170936.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/vegirufizedunu.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/73455072565.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/nugosavesezilurili.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/nosuba.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ed2098e104560869f09e790fa38c6f6f/45295393701.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/nebabenok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=heating+and+cooling+curves+and+calorimetry+worksheetPDF link annotation

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