Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dea56feb5467fe…

MALICIOUS

PDF

93.3 KB Created: 2021-09-01 06:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 182944aaed2152fef5285f83b7750b36 SHA-1: 55e8c94e7ab03b860bdd2b1d819ffa9f67762fc5 SHA-256: 45dea56feb5467fe9805195d992ce72df156b3d0217368ec8bcda0044397725c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. The embedded JavaScript is a common technique for executing malicious actions within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • 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
  • 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://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/aa4acc2a411a43612aa199ec795b8c83/76140565576.pdf In PDF document text
    • http://okzawidow.pl/img/upload/files/35039205544.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/48417553589.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160792c56b88f7---32965223715.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/43106549706.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/pawupokugevelunawa.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d078f26135e01ef0e72b405d2862160f/jemilivazuwolagid.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/2f8cdf6757b51ef9cc08731b23ba8c94/60002026054.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/kiwasoxeneda.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/vepadurawapimel.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/3199193704.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160f5fd409d0bc---zegekunenegajamegulilefo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7f30f2283---roxiva.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/sotuduvifixominapofu.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/zejufisidamu.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/b006aea30232567decebb92c10d0d8c7/13446396713.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/59738499049.pdfIn PDF document text
    • https://luminex.pl/upload/file/33719647309.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/nisilivajonifewigununajon.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jrr1smdhf76cal1n2jui95nfi3/weseverekilokowanapuveli.pdfIn PDF document text
    • http://ezibra.pl/upload//file/bagazupunagumemesetadebun.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e85a36933---20443399382.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/21332268755.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/pps6s5jb1h902jh4qbgskugh2l/30773111651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=wheels+and+deals+magizinePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 19184 bytes
SHA-256: 9b675c47ed204d8c04053ad0e9b2bf4b66a411ee2336e0a4347b16f33dfb18fd
font_01_sfnt_off00013777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F8E 10432 bytes
SHA-256: e9f1a6f4caf80710b632a0b5ed39fdc6693a44957ee1970bc128c38c75fc5d2f

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