Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d48abba08e92b67…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 02:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0171bc1bfdc5a4c634a63e06e87a176 SHA-1: 907ba556651b6ad7aa6a2c72163a794600b1cf4e SHA-256: 5d48abba08e92b67664d50178acb312fa00958a66c7bdaf4fa65de286c8e4210
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://queure.ru/uplcv?utm_term=organic+lines+in+art+examples PDF link annotation
    • http://kozhencherrymtc.org/userfiles/file/33561875830.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/wejekugabigigazo.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/41298212881.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/78422502451.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea71c77bb9---vivonaximufasakifuligadis.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/xubekimu.pdfIn PDF document text
    • http://agro-partner.com/Image/files/14721491000.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/84761546881.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/xibegowobibobonise.pdfIn PDF document text
    • https://projetovm.com/uploads/files/jesed.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b66c1c9582b99abca7fa9c1a6d60738e/19818405611.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/pomiwene.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/dinugulalowuligexup.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da001727ae---memebumexuta.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/78335902069.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/19182711196.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/paxojufalokakij.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/84059482725.pdfIn PDF document text
    • https://onlinendttraining.net/files/56537417387.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/89816480669.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/35994134535.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/doxetasadeko.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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 18004 bytes
SHA-256: 614cf65eb0a855e39c8715f22ae85473a8c069bf23e0543120673f41b2f7def1
font_02_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 10724 bytes
SHA-256: ddec41e5491c8daaf5fe18ac3aeb563a53af1eac2017f646d0513beeaabb0ca6

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