Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b85bf145768dbf…

MALICIOUS

PDF

73.2 KB Created: 2021-03-01 07:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0c0e7668559f66190760d140e4695193 SHA-1: 138976b9a7fdea69d052d97e46fbbae9745207aa SHA-256: c4b85bf145768dbffe65eb56419a2f296f7a8b65cc5c96e688a3506527f41704
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=manual+writing+jobs+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381544/normal_603c5dfa8bf4a.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/cMhbhaY/kafiritax.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/VUPvDcl/check_my_computer_viruses.pdfIn PDF document text
    • http://aarbuz.space/dark_tower_movie_parents_guidev6lj6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_6019f436595b8.pdfIn PDF document text
    • http://soinjaga.ru/lazikiwufudewofaxuz7vno.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/how_to_lower_a1c_levels_for_non-diabetics.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/Ahhiahh/menuvirasekupegewamasotun.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/egeihh8/pixel_cars_retro_racing_games.pdfIn PDF document text
    • http://nicepics.xyz/38174104720okdw0.pdfIn PDF document text
    • http://nesapumedavemag.iblogger.org/how_to_find_mean_median_and_mode_for_grouped_data_in_excel.pdfIn PDF document text
    • http://naturka.space/six_forces_each_of_magnitude_eithefyki.pdfIn PDF document text
    • http://gemajesubon.22web.org/laverton_weather_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_6019f90ba1ad9.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/jjbhbge/99152286830.pdfIn PDF document text
    • http://milansit.space/livexek0a4f.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/palevijuj/b_e_o_full_form_in_kannada.pdfIn PDF document text
    • http://tawajopawizapa.rf.gd/nice_guidelines_anxiety_2019.pdfIn PDF document text
    • http://nidubopavoxu.rf.gd/zusubimatixuwoburemonosu.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/pediatric_constipation_treatment_guidelines.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_off0000e343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 5316 bytes
SHA-256: b4a952124e4605400cf717595e5131a3b085edfba1882268b77a1fac5739d1e0
font_01_sfnt_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 10044 bytes
SHA-256: 763b2f5df0079ad8e950359ab79cf8778f4c8e0c61f2a39bb811b8a225a1fa54