Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69b0fe0ffeebcd0…

MALICIOUS

PDF

83.1 KB Created: 2021-10-18 08:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a2a1ccd24d7dbb7d5cfeaed2c5e43b0f SHA-1: ced26511723f2fd27e5be2bb4f4bd2ed836b6e4c SHA-256: d69b0fe0ffeebcd0fa4eeb78692ef4fac33dd7ab7a54fff9f4aedf4eb3a9bbc1
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://wastran.ru/uplcv?utm_term=swiss+chard+gone+to+seed PDF link annotation
    • http://fluitec.fr/ressource/site-image/files/bibupiledori.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/79102749743.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/49700711372.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/68205939167.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/87009574494.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/gojazu.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/noretojapilomovudatokawe.pdfIn PDF document text
    • http://salt17.com/userfiles/files/mutejevipuwipuwali.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/550993439615a572cb61ac.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a360e759bc15f71bfa2f5e8d4663e64f/ponogajubozitovalot.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/34075454150.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/gofurez.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27545424974.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/fepimorel.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/fesivedana.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/kudedovijer.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/dekelogajaxazakaper.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/22143956259.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/jisav.pdfIn PDF document text
    • https://xulynuocphangiathinh.vn/images/pic/file/56509449038.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/45686772599.pdfIn PDF document text
    • http://airsoft1.ro/files/file/vofejozewu.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ba1e8f884406e223db9731e3662b8614/vamudabedoza.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/2724302585.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/daserufebinerova.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/dokoramukanoru.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_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 17748 bytes
SHA-256: 00b282f1d7f2497dee9467a5d98f27feaad50c021301e606603d18c95286a897
font_01_sfnt_off00010e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E06 10764 bytes
SHA-256: dc22daf8130713b49fd526a77b1697a26450a888fa4a934c11e7783e558e1056
font_02_sfnt_off0001269d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1