Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c53cdbb537aa195…

MALICIOUS

PDF

75.7 KB Created: 2021-03-30 02:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1d0e89c0c74c58e14e5615a26709c449 SHA-1: 8f6ca106912dbf4a82effcdb68cf35e86d5d2c5c SHA-256: 4c53cdbb537aa195126d2d83b790e74539a1d5c1bd230b5c9916f04f81a1fdd5
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 http://metinozub.iblogger.org/11147526031.pdf In PDF document text
    • http://iqecoportal.ru/all_pakistani_movies265e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_602ba47751475.pdfIn PDF document text
    • https://pijusutuwo.weebly.com/uploads/1/3/1/4/131407307/belanopapunix.pdfIn PDF document text
    • http://dawuxapi.iblogger.org/vienna_tourist_attractions.pdfIn PDF document text
    • http://chisto-chisto52.ru/juvujajebonutukakv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_60391a3eec69f.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/xuzovuxuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408462/normal_5ffcd3e646c6f.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/zexutikasapi_towasubu_giwal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bQ3nTxENlgE/wb?keyword=non-linear%20plot%20definitionPDF link annotation
    • http://nufewaruxemo.epizy.com/62278897045.pdfIn PDF document text
    • http://bekokutiwafodi.epizy.com/ejercicios_de_identidades_trigonometricas_resueltos_paso_a_paso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a2cef5-9582-4665-918d-66056818144d/8457446226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ec6e22-d5a6-42c2-8e12-b810f616d59e/sofebek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d26d31b-bac6-43f1-8c68-7295e9a0f902/62168448030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b7a925-9cad-47ae-980f-b5099cbe9a05/neato_botvac_d7_connected_d703.pdfIn PDF document text
    • http://zifiroduvibo.rf.gd/cch_chuyn_sang_jpg_trc_tuyn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9f1a6d-3993-49f1-ba4a-3658271537cf/forifini.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_off0000e99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 4856 bytes
SHA-256: a2ca342314b553a1f52d45e5e88f98e5a658e5b8af3eb2632237a616a2784e01
font_01_sfnt_off0000fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 12012 bytes
SHA-256: 9f7df3071a47d374809008ae662e8fd18fa2d73aa511dbd4a78b641cffafed51

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