Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e42ae8379b4ce6…

MALICIOUS

PDF

71.9 KB Created: 2021-09-28 08:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8192c66adf7e8e549b968b5950ff733d SHA-1: 0fcec1e45e922e9fe8251d13173aacbd5a538ab6 SHA-256: 45e42ae8379b4ce6b9dbfad0f71c3d5439ae498744232781820eb83b0850184c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://infrive.ru/uplcv?utm_term=dream+league+soccer+dls+19 PDF link annotation
    • https://100tmt.com/uploadimage/files/20210916205354.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/4259094381.pdfIn PDF document text
    • http://pronobile.com/catalog/file/sofetubafebebojevomubusu.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ff2d8gdrfvm5mnom2dn232cv8n/10919223780.pdfIn PDF document text
    • https://ijp2.com/contents/files/78582695079.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/7527317202.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/sevogokakebobu.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/70852434323.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/muwanajav.pdfIn PDF document text
    • http://machin.kr/userData/board/file/xajuven.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/57575546620.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b158ad0232---boxadu.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/43109604262.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/vakoted.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/xojixebesikarabanawof.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/35320536599.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109110421357412.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/46799125777.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/80519291613.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/faxorup.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/97955560621.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/pewujuvime.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/zofibepelesome.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_off0000b43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43D 10740 bytes
SHA-256: 83ca0f316514533c6dbf7c7e23cf4e3e1ed028a0edb2dd625ddc46d731b61b1e
font_01_sfnt_off0000ccd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 17492 bytes
SHA-256: d1022c06c7674e6e55813b464171e4c7c9b648ea5501bd2509c1c643be42d172

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