Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba703fb43d6f705…

MALICIOUS

PDF

66.5 KB Created: 2021-02-16 23:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9e8015bb5b8ba390b11b4c8994b92fdc SHA-1: 7f1c515768653db0ed705aa07d53ad0bc2073f2e SHA-256: 8ba703fb43d6f705d6a41551f5f62d8ef1ff9575fa7cd47134d5fec2ad7460da
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=compound+shapes+area+perimeter+worksheet PDF link annotation
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/mizabaxo_malimenugagojax_mutipeza_zavonaxex.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/586559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_601d852d2b4ca.pdfIn PDF document text
    • https://xawawamofolapus.weebly.com/uploads/1/3/1/4/131436997/5bc5fcefb6b.pdfIn PDF document text
    • http://pubolovuwete.iblogger.org/houses_of_parliament_english_guided_tour.pdfIn PDF document text
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/7cd820e06fed1b.pdfIn PDF document text
    • https://sulezesolujoseg.weebly.com/uploads/1/3/1/4/131452841/6270191.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/8436962.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/rilemelebaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulomalizekuvu.rf.gd/root_android_phone_without_pc_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/erik_satie_trois_gymnopedies_sheet_music_piano.pdfIn PDF document text
    • http://bilunijo.epizy.com/89271097230.pdfIn PDF document text
    • http://ruvatarojamun.rf.gd/tixamexo.pdfIn PDF document text
    • http://fufibilola.epizy.com/comparing_fractions_worksheet_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/ardaas_full_movie_mp4_hd.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 5228 bytes
SHA-256: 11f50d8baac5b16f2100c72dbd10be636192a7ca926ade30fac709c6b575a30f
font_01_sfnt_off0000d9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 10392 bytes
SHA-256: 00cfcfd9d767691a62ca46cde257c686db9f7b6625834b751c4105aa564cb73d