Malicious PDF — malware analysis report

Static analysis result for SHA-256 da462ff4f1550a79…

MALICIOUS

PDF

81.8 KB Created: 2021-09-10 17:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2c2f3adbd91027198062a46fed1ec597 SHA-1: 78018fc72fe38e0a970b6a4bc7c526af11dcf6a2 SHA-256: da462ff4f1550a7905c868b6230a7e719a839b6d32397a1b7cc7e994e30a17b4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links, likely to trick users into downloading files. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded URLs pointing to suspicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=smart+x+iptv+apk+download PDF link annotation
    • http://pixel-pro.ru/upload/file/30547717012.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/kewokesoziwe.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/nixuviviruxixa.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/39136459994.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/27773594927.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/tasawixawuxenif.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/mamulafaxukoxal.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/pewebalos.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/remaronutuginazagopomuzi.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/14630890539.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/fikijepapamoketifexop.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/43231783361.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/74020786262.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/97210707250.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/f6708ebe0a4464fe331e2da062e1af02/52198592641.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/gerixexiloniboxiwafoziro.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/34900965951.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///jevidig.pdfIn PDF document text
    • https://irrisyst.eu/files/file/82233945210.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/83324779396.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/4c3ce06153c1b781b59b8ff59cbeebb1/xowidixemujigunase.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/7374671173.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613321c801008---38627361539.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/53703278442.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_off0000d734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD734 10672 bytes
SHA-256: a9a2d1233f365781299f24d54a53ac8767e7e693706212a5a6c891dd30055009
font_01_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 19408 bytes
SHA-256: 7678063f39f90646df9ca836f7699dba4fdfdb5418035b028814f5704b6911ab