Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84e9f9af5536f3f…

MALICIOUS

PDF

72.6 KB Created: 2021-09-09 08:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d5652c983e125b65a8c899b102d32255 SHA-1: eddac84d2a69ff40442f5becfcecd9e2f6f55a02 SHA-256: c84e9f9af5536f3f29dd95fc3821caaa652e96dfdfec8ca326991a20fdb5cd3f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/27618887361.pdf In PDF document text
    • https://ms01bet.com/contents/files/14670380895.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/jopefe.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/5728951142.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/narovavikexowugasiboz.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/68105617411.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/dadopokusaruxefefulizef.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/9896655646.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/48847659255.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138f654d27a9---81866895572.pdfIn PDF document text
    • https://stopserv.ru/files/file/44748493216.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/sobonesibixagutar.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/xifopesasem.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/50768756127.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/jowiwibopo.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/manopujasumewonenik.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210909075121.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/99468204204.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161358cab8b9ca---dujan.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/53474296253.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/52162476656.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/nomalatukawowadororojax.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/gosupevax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=sonic+and+knuckles+apk+androidPDF 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_off0000b752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB752 17756 bytes
SHA-256: 7fc9081dd3ac236432c3221c622449fb2325e9b7d410c72ddec7b51b552b0ece
font_01_sfnt_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 10676 bytes
SHA-256: 38655f878c5af33e61dd8d68c04b496d8d5bbfc6a35e6b5842e09940cb78f71a
font_02_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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