Malicious PDF — malware analysis report

Static analysis result for SHA-256 1406631674d30186…

MALICIOUS

PDF

70.8 KB Created: 2021-03-07 21:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 935f938a9c67fa4a5232069d3fc5193d SHA-1: af268ff60d8436e7a7efd91afbbf0cfe771fab2c SHA-256: 1406631674d3018686fd34af21fc7374b4bb36a68a670abf865c066531710207
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://druttle.ru/wix?keyword=trigonometry+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378161/normal_60348bea3ce07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fca8172b7c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_602eeb0387e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_6022ca69cd71c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lofese/aufgaben_performance_marketing_manager.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_f59aaa223d8145ebb1ed5e04c4fdcdd0.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_25f7f582915c4be4937d0eec0c4c2b32.pdf?index=trueIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_8f48016d89174e92b877414478d5112d.pdf?index=trueIn PDF document text
    • http://pejinubonuxus.epizy.com/wavowovovizu.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_5aa16e3e86ce48d39ca4672ccb7eaa54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27b3396-1246-4538-80fa-2dc2de47f864/what_are_the_different_option_trading_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/wedidirudevodolebat.pdfIn PDF document text
    • http://lekegavavab.epizy.com/sony_dream_machine_manual_icf-c1ipmk2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3addb9a4-5d75-4dfa-a7d4-d2c728ecd773/nesitad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c09884-e672-45b2-b1bd-8a71d41eaf8d/12928467246.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/56354881516.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/formative_assessment_strategies_for_social_studies.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 5116 bytes
SHA-256: a5bd869f696d23830a721b7eb5859c74c1ae9146c6d65e22ef7e384a08ed2ef9
font_01_sfnt_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 10320 bytes
SHA-256: 34273f6aabd7c035ec8417b0d8e01ffbbf24bd070a3750b84cd4851e741a5ca5

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