Malicious PDF — malware analysis report

Static analysis result for SHA-256 277f3869c835a4b9…

MALICIOUS

PDF

59.9 KB Created: 2021-08-03 09:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: da79249816ea0375ceecec1abb04bd43 SHA-1: 57ce1acc5e265ca053f204ce549b9e8184cd81ff SHA-256: 277f3869c835a4b98c2d73b9467693729ccdd1bfcb16c73cbb90c9a113e4b2e7
132 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3863

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://riasztoszolnok.hu/admin/fck_upload/file/gamewexumalejaxikerem.pdf In PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d463eb0be0f59fd18bcb79f8d70a6e78/sigovinosuzovatuxop.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0eaa932676ab46314c2ce34a1b08c12f/jozazojupim.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eb6f51f62---23847076866.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f29c84b9a3---43627965766.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a78fe94e603---xusora.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/5ec017d63e25b0cb17b1e2160fed1292/46288205535.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/llrgmn62m66u32suho3nh8q8k1/84412795217.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/c70aecf45a4d5abd27b3b2e1cdd7c96c/34929806530.pdfIn PDF document text
    • http://poorclarescork.ie/images/9504080651.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/68143790687.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b5c877f74---daxamumum.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f496ecf5---57442499277.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/36060897034.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a5b1c7c2680bc4d3fa5ae652bcae881c/sazuvoxubano.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/46210633507.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/16043143144.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/wasevikekin.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/83113986295.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/61016176633.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e0988e9db---likejoxepuzoziditetupin.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/de474237928f515aa1714f4949c01661/vasopujufozedodefujoxexam.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/fukavulosesij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+hack+gems+in+growtopia+pcPDF link annotation

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