Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c811e948f19caa6…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 23:35:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 354bbc3610a97589b79e8c6b6fba29e5 SHA-1: 3a6be07e0757ae56a863eee66fb43d54d279e62c SHA-256: 4c811e948f19caa670dc2776cd69f9f5e94dc7ef8c537ee9e80da3c0ec43ec5e
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/strik?utm_term=cuantos+libros+tiene+la+biblia+cristiana+en+total PDF link annotation
    • https://cdn.sqhk.co/zuwiwejagub/dgauTPK/tazisavigedof.pdfIn PDF document text
    • https://zijobezugol.weebly.com/uploads/1/3/2/6/132682913/jogawesoj.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/three_billy_goats_gruff_story_pictures.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/setobatifajojikep.pdfIn PDF document text
    • https://xepezexitig.weebly.com/uploads/1/3/0/9/130969834/d894da07f.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/2853423.pdfIn PDF document text
    • http://avtoshtorki.shop/26790711887xatu1.pdfIn PDF document text
    • https://deponoma.weebly.com/uploads/1/3/2/6/132696267/6206731.pdfIn PDF document text
    • http://stalekost.site/zimaxjqxzd.pdfIn PDF document text
    • http://playmarket-online.com/vowopanamidank05ez.pdfIn PDF document text
    • http://eeuuurrrrr.space/algebra_1_glencoe_mcgraw_hill_workbook_answerstrp7b.pdfIn PDF document text
    • http://omynutural.space/xamafugafixine8og.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/english_to_tagalog_dictionary_application_freehvuem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagekawunarav.rf.gd/volume_of_cylinders_and_cones_worksheet_answer_key.pdfIn PDF document text
    • http://jepogedepujadul.rf.gd/51329684995.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_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 4836 bytes
SHA-256: 481acca125e27ccc13bf00ebcd8f81c11ef3f4bdb25a17180c52e68605fe5e00
font_01_sfnt_off0000fb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB09 12796 bytes
SHA-256: f9800e627082b232d4c1a3ac649e28ac4e87a8d673a5eddb0219da99d67dce1b