Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79cb709aedd71c6…

MALICIOUS

PDF

67.1 KB Created: 2021-01-26 19:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 50aeddeb0a02b5a28e12ecb029d32751 SHA-1: 969f9c930037de72ec85dc73ae8fa15d97b60da8 SHA-256: b79cb709aedd71c67ba53c3a27eafc73552d8744115cca86dd65dd9e8d03529e
126 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
  • 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://maypoin.ru/123?utm_term=asphalt+8+oyun+hileleri PDF link annotation
    • http://submonster.xyz/caveman_5k_adventure_runte900.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/google_spreadsheet_merge_cells_shortcut.pdfIn PDF document text
    • http://idealica-uficiale.website/crash_town_kalinh14om.pdfIn PDF document text
    • http://helpverifybadges.com/jazekuvadotapagugiyrkvm.pdfIn PDF document text
    • http://lunesygets.xyz/dark_souls_3_low_level_invasions6iz6q.pdfIn PDF document text
    • http://natgood.space/outline_five_literary_sources_of_ancient_india_history5f3l6.pdfIn PDF document text
    • http://goodsun.space/starz_upcoming_movies_august_2020pm5vj.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/98943666983dlrdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5fdc0fda4708b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_5fd790a093006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370288/normal_5fe348c709164.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/dorujuliponi4q0s.pdfIn PDF document text
    • http://centerverifybadge.com/nosanifusijotamirf9r5q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://witeguxatuzidaj.epizy.com/policy_and_procedure_template.pdfIn PDF document text
    • http://mobisojew.epizy.com/word_2007_templates.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/ielts_speaking_test_answers.pdfIn PDF document text
    • http://paporoj.rf.gd/brittain_academy_test_section_5_answers.pdfIn PDF document text
    • http://kewivawegimomu.epizy.com/punjab_commercial_tax_c_form_verification.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_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 5192 bytes
SHA-256: dcd895c004630636e38c6c46cf3a46d2f4b79b26fe29ac72ce17d701745dc3e6
font_01_sfnt_off0000d9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 11440 bytes
SHA-256: 43e0a592725ac778c583ff7d0a81f9d901e160389f1e4a300bb8cbdfc6c5863b