Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed11531e2e9c36b8…

MALICIOUS

PDF

69.6 KB Created: 2021-09-10 05:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a22ff47e51fa138d8106ef18b6a4f11e SHA-1: 96e0c2b762f4f1a4058178aef1415a8d952f8d9b SHA-256: ed11531e2e9c36b8cd21c965174a956daabbf010cd4fa3994cb676ac92a1a0d1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which are part of a link farm designed to obscure the true destination, and one URL specifically references 'boruto episode 195 english sub' as a lure. The PDF structure and embedded links suggest an attempt to redirect users to phishing or malware distribution sites.

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 http://sallytour.com/FileData/ckfinder/files/20210901_971C061AC63B223F.pdf In PDF document text
    • http://fabtur.ru/upload/files/bawozasijipuwil.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/15267957071.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jevomuraz.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/72205554210.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/55793297901.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/79fafa75644346d3fb99cba47c6c9377/38927458773.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/bomexujevorin.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/jukesavexadukiri.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/43787613505.pdfIn PDF document text
    • http://telecycling.org/files/file/66874379249.pdfIn PDF document text
    • https://wonkingchina.com/d/files/ligujavik.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/69090019855.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/49122916908.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/50581252914.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/19689148132.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/kanizew.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210904075353.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/zevilojobefemivuponuni.pdfIn PDF document text
    • http://davcpundri.com/css/file/xulivowogusoxakekeve.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16133c541cfa34---jobudimanidagoxovebef.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/nibut.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/danexoborumoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=boruto+episode+195+english+subPDF 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_off0000b2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 14548 bytes
SHA-256: 7848afd4de68d9969a3956f45fc7a1fd61c64ba1372e43117c3106fcd60a9f48
font_02_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 11156 bytes
SHA-256: 88d2e7e0a0ab152bd649b1f3496c29503f78a64c544e97f4b52d690d8f083aff