Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d54fbafadd4fd5…

MALICIOUS

PDF

80.8 KB Created: 2021-08-27 17:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a3e22e2d4ee7aecc1ab3ffe20dec37b SHA-1: f5f9916b9f54779a1a9a2a19f589ed5d26428dbe SHA-256: 62d54fbafadd4fd51690b09698458130c8fd82ec2c8feb702ff4d1b8a95c766e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate high maliciousness. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • 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://coretry.ru/uplcv?utm_term=electrical+components+symbols+and+functions PDF link annotation
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/bc1ba13f757a1a66ecb425be4eb1d7a5/94633727118.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/mojigebezukipokizil.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/fb61790ac18fd5cd78206152de6104a3/83749703990.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/4ea823abb1ff57600db20b17eebf2cad/28282328914.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/62459428171.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/dazaz.pdfIn PDF document text
    • http://toonesk.com/upload/898001869.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/zokupepenokasoduwi.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38bddc04b---tafileju.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1fe2629a8---21569651997.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ffe7c8387---wojusajujaxaloxeguxe.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/korizurabulavefat.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/83071263622.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff3a8e855---95284344744.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0ecfb452cf497e0621dac0aecde2a38b/mipote.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bfc30d760---72979008650.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/dezapozemejiguwix.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/jufawakeniminefafidivu.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/kssegbc8vjntfhq3msavhs6pm2/57434476229.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/nejezabiserenegalexe.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/29607069543.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/zipoxak.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/f6b57963fe3041a5583f7e29626abf9a/bewezomebuw.pdfIn 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://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_off0000d70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 11120 bytes
SHA-256: 4e1d061f7068ef191896789cb44f29b3317a785813c51b183da54f1884de32ab
font_01_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 17392 bytes
SHA-256: 4ce7a5e8985bfa38c6dc7277896906ad48c0e95c0fe681d0501486efe1d025b4
font_02_sfnt_off00011d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.