Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a25618ff7b4c06…

MALICIOUS

PDF

89.9 KB Created: 2021-09-15 17:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9d7738d9967df1acc24f34183ec0eddc SHA-1: fe7cba1531d8a69227668d5c4b166f43be30fc81 SHA-256: 29a25618ff7b4c06003ad10353f1ca6eda2773eecd36925158d69b500aa8dfc5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links to distinct hosts, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/sanemokiketokinizage.pdf In PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021091120265373499.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/75231643311.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/nusokojoxovosilitek.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/sagikifazomerewojiluxozud.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/87834844650.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/2351821123.pdfIn PDF document text
    • http://computerdoki.hu/user/file/42309125284.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/87245536605.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/xevunuw.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/48830729780.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/91432738430.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bca650d631---jotewigofolupeteteja.pdfIn PDF document text
    • http://konberdbio.com/upload/files/gurufetofodinavuxedi.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/19025374139.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372a44a43f7---wewodomexugelixufifenom.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/88776298099.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/nusopusizeb.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/34169473481.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210914_46A082E6A8DF9B8E.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/5294165848.pdfIn PDF document text
    • https://agermag.ro/mm/file/64347359743.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/32843694895.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/jubovusibaxez.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/45180975828.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/7343904368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=motivational+words+beginning+with+bPDF 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_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 17956 bytes
SHA-256: 282f281ca4fe06dd9951df25a98f0c258d345ac3bda7dc7397dcbfd4752acf77
font_01_sfnt_off000128f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14109 10812 bytes
SHA-256: a1bae34808495b9f8666b6da866b51897e9656e2864401774a3e122d1163a326