Malicious PDF — malware analysis report

Static analysis result for SHA-256 54eec31b06be54a8…

MALICIOUS

PDF

159.8 KB Created: 2021-08-04 10:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48618fc3c672aa63bdec3b0812d0d24d SHA-1: 1ae32378c8bd07fb5d2d3b8ad434ac7b473063f9 SHA-256: 54eec31b06be54a8a3fba219b87d3b9019c505fc9f3e80bad7f0a8f0b67393d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised WordPress sites and disposable hosting. These elements suggest the PDF is designed to redirect users to malicious content, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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
  • 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://lawyerupsmart.com/tempimg/file/74967726969.pdf
    • https://grandplaza.bg/uploads/assets/file/gopadirelikotixux.pdf
    • http://infinity-pro.ru/userfiles/file/83887084486.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dbad9271f---ladixakapubi.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f95ee3044---93180027584.pdf
    • https://jairdefreitas.com/ckfinder/userfiles/files/46396608694.pdf
    • https://arhstroi.by/uploads/files/2636048839.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/tidadisi.pdf
    • http://tipkeo.com/js/ckfinder/userfiles/files/tigibudutumorokuzo.pdf
    • https://baxsporthorses.com/userfiles/file/jutigupegud.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/cd297b65de27c6cabb747af251548edf/padabomigebulo.pdf
    • https://medicula.pl/web/uploads/files/bazabazuvi.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c38e72eeff5---94631640535.pdf
    • http://alituncer.com/userfiles/file/8213650812.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/0567978ae1794825b2309f58835d005f/fotifobajugusex.pdf
    • https://mps-india.com/userfiles/files/17057433844.pdf
    • http://altadirezione-consulting.it/userfiles/files/7027178234.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b77b0c55cf---nejutofabosonoju.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607448520a3f5---xesezoxilixugogodopapasof.pdf
    • https://signika.pl/Upload/file/47614105851.pdf
    • http://smclassof57.org/clients/34860/File/20645717141.pdf
    • http://eltonltd.ru/sites/default/files/uploads/dupawadagawimufuveruzem.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b50feda502376797220653401a0e00f0/68440094995.pdf
    • http://bisenzia.it/userfiles/files/sanugimeboberepipu.pdf
    • http://bukharaatlanta.com/sites/default/files/file/dapitaxefotegupoku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=soap+for+internal+medicine
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002080d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2080D 16792 bytes
font_01_sfnt_off00022024.bin
2a66687867b6cf30a4d27bef1ffc20174f3748976ee9138004fa22df2a1a90c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x22024 10688 bytes
font_02_sfnt_off00023898.bin
e15c287812947e901f74ad63f9113ab5ae6025a5a57e9cfd451061c3177f0b27
pdf-font-stream PDF embedded font (sfnt) at offset 0x23898 20676 bytes