Malicious PDF — malware analysis report

Static analysis result for SHA-256 4446330675c51602…

MALICIOUS

PDF

76.1 KB Created: 2021-09-19 06:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 568b2f5433d0cdba1a9fd3c182483549 SHA-1: 6855a759824f1b56778bcf3c86d871898652990c SHA-256: 4446330675c51602b08a4b70c0c1e6e51aba5149ddb8a2ec3edd38029f4b0899
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for initiating malicious actions. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest an attempt to redirect users to external sites, likely to host further malicious content or phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://vet-spb.com/userfiles/file/52432850927.pdf In PDF document text
    • http://jgweld18.com/UploadFile/file/20210902121730810.pdfIn PDF document text
    • http://synergyproperty.com/images/files/nemojuginaliwareka.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/maxakobamifuwa.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/ligonuraxiferujeganitavo.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/85ee481d44b38fceb7a5e265d772071c/mevejosefodumuwam.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/pirasejanewowusozol.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/91577677977.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465e6c4167a---jugitutozedod.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/70855457452.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/wemevikinisiw.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/7538211865.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16307649393498.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/75353671997.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/65221727555.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/63755177338.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/68631285291.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/xamigotafubazusaw.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/lawoduwodusuluji.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/71754352576.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/90360461954.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/vekesijoxolevilizodo.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/wunexibadaj.pdfIn PDF document text
    • http://xuanfe.com/uploads/FCKeditor/file/xogilofedazu.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/26110033966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=dino+world+apk+modPDF 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_off0000c659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 10336 bytes
SHA-256: bd5fd14c1e27909a96dac4415b7fd732c60bad897dd78086d79dfad82dd9ffb7
font_02_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 17520 bytes
SHA-256: a4df50b1cba32369119a2f269d41539ddcc090c435484d56d4d953a33e6de050