Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e384e439d222ce7…

MALICIOUS

PDF

69.5 KB Created: 2021-09-29 12:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b32c83a0f96b8e4e5680392bcef601df SHA-1: 05118e9226db42587c90179dd8cd6146b21f0239 SHA-256: 4e384e439d222ce7150501ac9eb816912860afd5a3ee957edc461997abf08c74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://medvor.ru/uplcv?utm_term=android+google+play+change+account PDF link annotation
    • https://kingdomofgodmn.org/userfiles/files/75374167020.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b9670ed0ae---96390467592.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/mazur.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/10486178712.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/midevaxolunenebosel.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/xafenosewexifo.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/46747216744.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/45331602990.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/zamefiro.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/muguzap.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135daf66c739---luvuxumenowejibazalidaz.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/19286616138.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/62623700607.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/buxagiwi.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/fabed.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/11025697023.pdfIn PDF document text
    • https://go2germany.ru/files/file/jotupirab.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/fobejogomedipenivovir.pdfIn PDF document text
    • http://poliinc.com/upload/files/xaxatedajisedegalivawo.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/84699889032.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6dad02983---42906364071.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/femigakagegakimebado.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/papiwebagidumadodimefovis.pdfIn PDF document text
    • http://www.amanuttarakhand.org/ckfinder/userfiles/files/xodijawiketunevizup.pdfIn PDF document text
    • http://zmz72.ru/files/file/zifujapapuzixajasos.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_off0000b074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB074 15388 bytes
SHA-256: 91fff291b17d1e9082ca254e561be73e302a8c3a261431f19fa6e1fb11cf68bb
font_01_sfnt_off0000d760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 10820 bytes
SHA-256: 12c254ccb64c0d3a3a1f2bf15c3fb2dc2366afc4acef72f504f56fd34504e89e
font_02_sfnt_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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