Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c43155fd836db1d…

MALICIOUS

PDF

68.7 KB Created: 2021-02-17 11:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4395fff50215d4f8a59e058881ddb833 SHA-1: 9019099652872367957e6d0cfb83ed766ec486ff SHA-256: 8c43155fd836db1d0f05744b87ebd88eec78f70a0cde8edc6173c2d2be57766b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=bodyfit+by+sports+authority+stationary+bike In PDF document text
    • http://momentikshop.space/gupatepizigapoletawivafjnw6.pdfIn PDF document text
    • http://pop-marketplace.ru/olx_casas_alpinas_em_vendacfm0b.pdfIn PDF document text
    • http://paktum.pro/fiba_official_basketball_rules_2018ebz4k.pdfIn PDF document text
    • http://natural-shop.info/world_conqueror_3_campaign_guideig73x.pdfIn PDF document text
    • http://golden-charm.ru/fedujukaraxek8m8u.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/hYja5gf/stickman_killing_zombie_3d_apk.pdfIn PDF document text
    • http://copalofa.site/input_output_tables_worksheets_grade_7evsop.pdfIn PDF document text
    • http://ibkreactiva2020.com/sazetbbeey.pdfIn PDF document text
    • http://lorenbayi.com/dunasulikolarukadulapnv7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutimeban.rf.gd/android_tv_apk_netflix.pdfIn PDF document text
    • http://mawesawikatunus.epizy.com/family_feud_free_online_game_without_download_multiplayer.pdfIn PDF document text
    • http://sizuzupapefapo.epizy.com/73159717556.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/rerosukinif.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/navodaya_application_form_karnataka.pdfIn PDF document text
    • http://mawigugu.rf.gd/30331214799.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_off0000ceef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEF 5452 bytes
SHA-256: 791fec9f92f856f451f5d8acbff200753d582488e379b5377a4634b9f7fe08ba
font_01_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 10704 bytes
SHA-256: f2a7eddcf3e1c416d4dece4db65d9a4e1641a57e9454a38ba2720b7994297677