Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be217400391f967…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 05:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b6740b35d5a41c95803d2d2d5ac9b5d3 SHA-1: b9f1c06d2b11a7285e10416c7d1c38466918b05a SHA-256: 2be217400391f967f324f22be4ccf750c72f73c4eda911fc9da5cde788fcfefc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on 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 these external sites, which are designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=how+to+change+bluetooth+passkey+on+android PDF link annotation
    • http://celyroknaterase.sk/editor_uploads/system/files/bagotufipenigu.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/boforodo.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/383381985.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/69592828508.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/kuligunitofojow.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/zogij.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/jedapifepananonin.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/40846384098.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ahud5vrampcop55cg9glsscht0/88673690178.pdfIn PDF document text
    • http://artediapharma.com/upload/files/83089502274.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/pabezovopixagufabepeb.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/95035976891.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/8460075852.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/54730650609.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/gigixasezemedefesepexilo.pdfIn PDF document text
    • https://digireg.cn/upload/2555117835.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/53313162431.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/mipuvosevasujixezo.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pigubefo.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/zedibobunuladedexomojudox.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/tanowenebekemimojuvef.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f79ba35538---nesukerisijajuzozujujufa.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/rivesutikek.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/rigawasikazuvudosebasama.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/xexodobozalosixopuv.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_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 11316 bytes
SHA-256: 7c668d16b9fb6d5fd5368929adb83b90613189219ee5704e9c3d748a442f38e5
font_01_sfnt_off0000f59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAF 17700 bytes
SHA-256: e30b463672c6eb8edccaff9e052855c0d1b63a6e6632b6daf3faf511e248e846