Malicious PDF — malware analysis report

Static analysis result for SHA-256 3542794c03f62dd3…

MALICIOUS

PDF

92.3 KB Created: 2021-09-01 11:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1dc70759efbc077b310c5dc8eb50e1eb SHA-1: 090af411d51363b4ff03eda2f3aad38f649e0c8e SHA-256: 3542794c03f62dd354d90cbdb3b10bf5f6e7e2409a42fddfe087889cd630ec64
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. The document body is heavily obfuscated, preventing a clear understanding of its direct intent, but the overall structure and URL analysis strongly indicate a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://nomylo.ru/uplcv?utm_term=bollywood+top+movies+2020 PDF link annotation
    • https://gerastar.com/userfiles/file/50739359450.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d22782757---24026237864.pdfIn PDF document text
    • http://m2m2design.com/userfiles/lugozubupu.pdfIn PDF document text
    • http://net-work.cz/data/file/97009061501.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/63442ac308c486832cd9c67f5ee7db89/tepobiwajubadugaxanisu.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/serapuzabugaziregaxapux.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/xatajonavaxenunufunofufu.pdfIn PDF document text
    • http://expresskaliski.info/file/565443536.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6a0091ab998773ab861f1ec1d081c661/zobukedanigowaz.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a124f4c9b87c630b4234d89d1432baa4/xowenorunadidevikud.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/82957644180.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc31eaccb---sagafewuw.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/biridujokax.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/80123206988.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/tipubativ.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/donezizebipasov.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/37308221562.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/nuneviba.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/dajufuzevutodajozoror.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160946013c9242---jejagutorexewinexewiwi.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/6119429071.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a7356e0fe63---28877273172.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/vtqi3b6fbnd6ptdhe2j86otfjo/83468057668.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/64631916128.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/xupuzajax.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/parukodewumumenunivekefi.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_off00010611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10611 10748 bytes
SHA-256: 2b04cf1bf440d6812550098f8ffe8385cf0cc61acab0447f10bdb8fae778ba81
font_01_sfnt_off00011eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEA 17228 bytes
SHA-256: 4e6ecbe85584c859088a17af0dbe1657d4717df775a92ff022ea5f99052af11a
font_02_sfnt_off00014ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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