Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d7dd614ae30d6b…

MALICIOUS

PDF

80.2 KB Created: 2021-09-09 07:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6490cdca11709756a56cd71486cd51ca SHA-1: d6dfbdc0a009bb27b7c4d3ee1daa7d59d0699576 SHA-256: 63d7dd614ae30d6b182f84ccb154f2e8194ff35f5952b028b4da5d1c6b2feabc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a high number of external URIs pointing to various domains, many of which are flagged as part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/69538247433.pdf In PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/47203791471.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/rifeginuwi.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394ba93250f---82738953970.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/fopomerazarutuw.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/33840940865.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/pipalomumirorakosidowele.pdfIn PDF document text
    • http://baove24h.org/upload/files/19451249844.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/0e9d88824a272ffe1b9653b61342b7e3/dazosa.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/11840199063.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/77857534548.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/kurijikepozuzimokelup.pdfIn PDF document text
    • http://roosprommenschenckelfoundation.nl/userfiles/file/58297748558.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/15734866863.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210902050554.pdfIn PDF document text
    • http://w-mill.jp/images/file/35854770088.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/49010593248.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/54704097921.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/miririlolozozije.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/tikosefofokesekasub.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/9813130485.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/57520240530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=percy+jackson+the+lost+hero+pdfPDF 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_off0000d4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C3 17176 bytes
SHA-256: 77eb6ee48c036b31535d699781fff4b07ec85cbe0dfaf37607da72d525f596cc
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 10960 bytes
SHA-256: d0116fe2acbf326692edfb894a39dc952eef95a9524ddf4879bcad2a86cb5460

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