Malicious PDF — malware analysis report

Static analysis result for SHA-256 278f1f1c9b89268c…

MALICIOUS

PDF

70.3 KB Created: 2021-02-24 22:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 354f03090b8fb4a00a324c06f714def4 SHA-1: 1d5bbabe2d1df381768d4650f133620c303d5eba SHA-256: 278f1f1c9b89268c2ff0fadc008eb339bba29966d41cc6a53606f02427732703
184 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
  • 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/award?keyword=spyhunter+4+crack+download+utorrent In PDF document text
    • https://static.s123-cdn-static.com/uploads/4499942/normal_5fdf2b952784e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477387/normal_5fd2f7fc8ad97.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/80309244575.pdfIn PDF document text
    • http://groby-ritual.online/metrotex_richardson_texasyxw62.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/how_to_reset_sentry_safe_factory_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5fe780fbc1b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fd0843163af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_6029dc5559a7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_5fdb2dfe4b834.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/keputalomab.pdfIn PDF document text
    • http://mamontov-net.cc/88405034049facsl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5fd92b61c2d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_5fda76cc6965a.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/mokuwanibof/commas_in_a_series_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/20246461034.pdfIn PDF document text
    • http://foripoj.epizy.com/lcm_worksheets_7th_grade.pdfIn PDF document text
    • http://valamujunitun.epizy.com/beats_studio_3_wireless_user_manual.pdfIn PDF document text
    • http://matogidujizovoj.epizy.com/28064361231.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/exercice_algorithme_informatique_corrig.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_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 5432 bytes
SHA-256: 7215cf9fb4ae5475e7dcd35b08d02c1309cfac0d8f20454d455578d168a18bed
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 10208 bytes
SHA-256: 735ef57f34c83ff49c96f34d6dcf94a7fcbc952474a9aa8af251c0ec8034988f

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