Malicious PDF — malware analysis report

Static analysis result for SHA-256 93384a4dbff00eb8…

MALICIOUS

PDF

68.5 KB Created: 2021-09-30 16:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e622018ab097545534f32138f3f0fd54 SHA-1: 858efff650938f77c294a86309075fed7ff7065b SHA-256: 93384a4dbff00eb834370a0d7e3a1aef2559f886226f86ea351e5b20c1804d77
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used to direct users to phishing or malware hosting sites. The embedded JavaScript likely facilitates the redirection or delivery of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://marlin-aquarium.ru/ckfinder/userfiles/files/waxalewetolajeputixu.pdf In PDF document text
    • https://posetili.ru/userfiles/file/61479559292.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/359079ba1585badb3456732b738ab0e6/judixutozodas.pdfIn PDF document text
    • http://hotechike.com/files/files/13848969189.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/43502184914.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/pekituz.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/guresa.pdfIn PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/sibibutebajewa.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613e11df047a3---ladorivifozutasovejeba.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/23322895522.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/fevekabetuvorapar.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/nanejuwamatagora.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/newovewapilimelidilarut.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/93056245379.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161559d34d4bd3---nofoz.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/39907328457.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/46284704232.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/tusuxoduzepukutora.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/81960309863.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/40224427374.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=best+phone+manager+appPDF 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_off0000abbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBD 10616 bytes
SHA-256: 8bb1c3f2e0c7de4452a27451bb8e28aa2b9cfc81ad1d64070345ef250de70f91
font_01_sfnt_off0000c3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 16036 bytes
SHA-256: e5a7d13268f4e38a1af544f8ca25e666c5e5f54a80e34197c86da19a588580f4

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