Malicious PDF — malware analysis report

Static analysis result for SHA-256 0866de964996f4bf…

MALICIOUS

PDF

75.4 KB Created: 2021-06-07 08:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d71692e5c1e684cb9e3004d6083642f5 SHA-1: 9239d385ce922554114c68d2813b15749e2392dc SHA-256: 0866de964996f4bf0ee906a73adce9ad0ad48f46e3c363b19ca899faaa0de005
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content. The presence of external URIs and link farms suggests an attempt to lure users to external resources, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://laborke.ru/uplcv?utm_term=d%25C3%25A9monter+garniture+porte+306 PDF link annotation
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d87e5d96e---luwokep.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/5758808433.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079bcbd7bdae---bajujaneb.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3fusrb1t9g3dk18mkq4kj5aa71/kefesobakixitujeve.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098979c91da8---59734785919.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a15241af8---28526299367.pdfIn PDF document text
    • http://azizolace.cz/images/file/tadulawemenitazurow.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e1f7417655ac431b63de78f2b9394c54/61227900495.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b577a063c34---62771181715.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a185b24af21---ramapuzumuso.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160864e3d36f73---83771119609.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/vubapulezoweguzo.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/36001273946.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ngk074v5lcl1cjbavjcga94dl5/43987630031.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4b91abfae7534962935f3ded0afffca6/fijugipiwazegonidowojaxe.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c31fee08f---xokukuwobusi.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081bfb62492c---womeruvojowi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e7c128c08---tusijodedebetijasavep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5528 bytes
SHA-256: c02587803d94159ca9f13a1cedc1455cda288d474639362faca7dca3279c9d91
font_01_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 11792 bytes
SHA-256: da44f20e9c1b694da854a6d5d2d6d33d41d3fafc79455eb8487b7fa1414ce515