Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddadc108569948e…

MALICIOUS

PDF

76.5 KB Created: 2021-10-14 14:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b22a11b57f8a3d26e8bf3a1ad4d5cf0f SHA-1: ced2f1ea47de562750f0ab8576eec9dde12a41d3 SHA-256: 6ddadc108569948e4abf7744bf7484b9cf44a1ae0fa34130cecb65542dbb9a70
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed numerous embedded URLs, many of which are hosted on potentially disposable domains and appear to be part of a link farm. The PDF structure and the presence of external URIs suggest it is designed to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://catamma.ru/uplcv?utm_term=kid+n+play+movies+class+act PDF link annotation
    • http://krzysztofmalec.pl/gfx/fck/file/bunelamipiriki.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/damojisarugare.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/477438458.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/tesemopu.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/zilafazoluk.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/30759389630.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/xaburabon.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/203a40642405066e6126eef9ad6c5fde/23121942496.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/35554252906.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/16388504623.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/zuder.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/16827035473.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/mosat.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/98882246922.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/xezutozuxosina.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/47326942246.pdfIn PDF document text
    • http://wixoon.hu/upload/file/nivitubodezupapixelerapo.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/degowefevurikumafelamu.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/84732333981.pdfIn PDF document text
    • https://tomas-music.com/contents/files/metomovosarijebul.pdfIn PDF document text
    • http://insk.ru/img/userfiles/file/petovibuve.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/66782087344.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/4822855934.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/45730576423.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/81580240988.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/zunininodazuwalakizi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 17708 bytes
SHA-256: 4f59b793ee806ffc92f147f48255d7849a607ce79f8c4822fc0d39aa8577257c