Malicious PDF — malware analysis report

Static analysis result for SHA-256 9653b477af73a2f9…

MALICIOUS

PDF

69.7 KB Created: 2021-09-10 03:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 174cefdbe3baeb2a2a9d522498c57a5b SHA-1: 56f4579ea3f7c40fdfccae14df277909bf73ef2d SHA-256: 9653b477af73a2f99213fc3135d96db682b951fd82657f0610fd8e1a37cb25dd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, suggesting the document is designed to redirect users to potentially malicious sites. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://pixomot.ru/uplcv?utm_term=android+app+user+data+location PDF link annotation
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/nadimuverisoduterove.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/33113152528.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/30225052477.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/jesajikuvivib.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/lagef.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/79292116610.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/riwomutenopurifilisuro.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/jabokuxasifomaluvebarona.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/71384731683.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/noduzafezob.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/27510913087.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/90868760192.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/62457204165.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/70956879501.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/24877919162.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8f74bce085295b8d7f8b5a3148deb571/rekiwixutusef.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/49079947038.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/gelivipavow.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109092003415344.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/70270814173.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/loworovutanixobebu.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/42679303395.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613944530d15a---fobevefedupopip.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_off0000b407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB407 14744 bytes
SHA-256: 4026864f72833ea2dfbf8ce6eabf3d50a587531d4bbb78a397daa34c93c1777f
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BD 10588 bytes
SHA-256: 170a49e4c1a257547eb2e341113ee612b5ffc3746e7820e20064d7e519557e2a

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