Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb4fea107b04c18…

MALICIOUS

PDF

83.8 KB Created: 2021-10-16 20:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6242e490c8a7f7553bd2c82840d4ad9f SHA-1: 126bb7010d901155b8b344f12e66de6a4a175986 SHA-256: eeb4fea107b04c18fa149b926f5ff62894c6df701e1940746fa9e0eced276176
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute code within the document, which is often used to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/lixiwepowufe.pdf In PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/madogobotexenodo.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2e6d7db195187fce2f43e511f0af26b6/lokanejixekiresinikulo.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/derejaruwezeni.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/vanoluxibikanakobedoj.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210905233508571.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/wigukegovitosomaxon.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/81887202484.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/64cc4bdd78a5b9acf7a69ca525f432e0/genewamafogevabedopax.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/89950586133.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/33855516749.pdfIn PDF document text
    • http://micruts.org/userfiles/file/2550490055.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/46275901542.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/83206510104.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/95594137317.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/bisafoxevukujofipo.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/7071406887.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/gefidabavudijakufufa.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/mafije.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/difakifavejumerixu.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/papuwodelave.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/xugamuv.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/41732102512.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/1hHberoKktI/uplcv?utm_term=h+union+k+is+a+subgroup+of+gPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/20527968118.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_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 10580 bytes
SHA-256: 0e67f13db671958043e44f0ffe6914cca9aadb508454729d0b8bd435d8bdfa82
font_02_sfnt_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 19276 bytes
SHA-256: 7a25fd0e5d7d66da45a9d3e5f6fb6d288941c2f7e288c9fca420128c7f7c64dc