Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ad702274ee866…

MALICIOUS

PDF

72.9 KB Created: 2021-09-21 08:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 7d0d4e3c6ca1e9064c5df3d7addbc0af SHA-1: 1cb8371cd6a08a69f66af137ff6748e0125350de SHA-256: 700ad702274ee866f247fca992c8d59b1be6fe8636f5f493e99e484570d91a8f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8293

Heuristics 5

  • 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
  • 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://archism.ru/uplcv?utm_term=photoscape+apk+download PDF link annotation
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/tonadejarimemetijaniduzaz.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/batomudipigad.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/taxofapisasedobamopo.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/20203828924.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161342e6091f81---rurizuzigose.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/59411961754.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/gepaberoloxobobim.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/dewerululokesogafem.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-19/20210919052922135597.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/fakatugewovopefolujisul.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/6ffa5091af130a55f6233c70c4afa410/24608619380.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/jetemuzo.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/83429352327.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/37282494865.pdfIn PDF document text
    • http://sergeybazarov.ru/file/vurasulu.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/dewugugivivevo.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/nusujinokowakibuw.pdfIn PDF document text
    • https://okazionche.com/files/92673875542.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/vuwiduxotujabisodas.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/sedorarefano.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/14721199327.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/72804358191.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/gumaru.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/95147317480.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/74781661816.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/dudavumimod.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/raxozoradidejowuxi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 10600 bytes
SHA-256: d6ffdf0b5e383bcd3b270c81f0cab8edb69c6e66d361eff71b7a16e21a401301

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