Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c11dfa0784fee5…

MALICIOUS

PDF

75.2 KB Created: 2021-01-31 21:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 43d341f5618a35126dfc94fe7744a333 SHA-1: a2ec9c86eff60fbee220c4e89e8972a4ebd8eafb SHA-256: f1c11dfa0784fee551cf1884a8a0975da550a6196896d7e94a5b856707710a2b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://maypoin.ru/123?utm_term=dallas+to+sydney PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415543/normal_5fde02bda73fc.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/iahjij2/indeed_job_search_vero_beach_fl.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/c4b63a205c24ee.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/template_kaos_hitam_polos_vector.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcc1c64c42cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_6013f34d5bece.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/mhe5zN7/mi_telcel_empresas_telefono.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hgLiagc/zuma_deluxe_apk_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/cihhghf/my_talking_angela_mod_apk_old_version.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/big_time_rush_songs_audio.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/wukara/bootstrap_templates_free_responsive.pdfIn PDF document text
    • http://nolumuj.epizy.com/32152742848.pdfIn PDF document text
    • http://sewexojin.rf.gd/duplicate_marksheet_pune_university.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/xofojivijesa.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/reimbursement_specialist_interview_questions_and_answers.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_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 4824 bytes
SHA-256: 41c09c3e34d433b6c239810f426ed33a1a5ccff1896f381b419a15a988bb43b4
font_01_sfnt_off0000fadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADD 11084 bytes
SHA-256: 6bff76f08d63f2deeb386da334485fb1b35f6a0e98142d679291d1d3da77a7f9