Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dd7e2438b8bada…

MALICIOUS

PDF

54.6 KB Created: 2021-07-14 07:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: edc6b7ee9ccfd3072ae2995232f2fbd8 SHA-1: 6c2585958f9d2b88e213ce060a7da3c463f9888f SHA-256: 27dd7e2438b8badae7abe15116630a0d69a23da2e0c28ded0f9152a587ab02df
162 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious payloads. The PDF also contains numerous links to compromised websites and disposable hosting, suggesting an attempt to obscure the final malicious destination. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6190

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 https://crewmak.ru/uplcv?utm_term=amazing+words+that+start+with+d PDF link annotation
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b456ab3a3---palowifemosisisevavunage.pdfIn PDF document text
    • http://platcometals.com/images/file/2916830082.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/55881529149.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b5af797cb8c8eb4d96016f7eb6ed8774/90605216080.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/livobijaxaj.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/97848151935.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/14885136684.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/wulepe.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731905aa290---64825101618.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7hgm8v1j1q33jtqu0a5um4mch0/jumokogusakimixekegami.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b339e56992828331e88c7749ce2b79d3/75338286410.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5aa472545f---jifejuduwajoravis.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/jefojiw.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/64698246798.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/dukiperuxufumolotix.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/15888564520.pdfIn PDF document text
    • http://zerosquareonline.com/file/76808677745.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e38ed6d36---60670734271.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7e16c5dcf5a9e4e32ba1e317a7d3277d/donugosurag.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f4ff6c03ba846b21d656ff6c09243b7a/rijirikemawejosoru.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/51b4cefbc870e2ba40c0fa9014e3eb09/kixumifojupovewolejepira.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/kogodatakaxare.pdfIn PDF document text

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