Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc465d9214ff39dc…

MALICIOUS

PDF

72.8 KB Created: 2021-05-29 00:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4066ca6809ec2a0fbd50330f7a2719a3 SHA-1: a933155fee7474b78d41b1991ec49d0fac563123 SHA-256: dc465d9214ff39dc69221bf64aaab56cc5e41e3a077bddd72db3b5c1c4a2ff82
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to various external PDF files, one of which is a phishing lure for Corel Draw X7. The presence of numerous external links and the ML classifier's high confidence score indicate malicious intent. The document's structure and embedded URLs suggest it is part of a campaign to distribute phishing or malware content.

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://jacksth.ru/strik?utm_term=corel+draw+x7+para+descargar+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498883/normal_605b03c19b198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5ff9c8bc88ff9.pdfIn PDF document text
    • https://bajevopado.weebly.com/uploads/1/3/4/4/134456845/3050121.pdfIn PDF document text
    • https://pigegiwoxare.weebly.com/uploads/1/3/5/3/135385020/746af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fd7b88b57b69.pdfIn PDF document text
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/4533115.pdfIn PDF document text
    • https://rimimasosonajis.weebly.com/uploads/1/3/2/6/132681992/9f5156.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485926/normal_5fe15147387e6.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/potozo.pdfIn PDF document text
    • https://guzorinimalagaw.weebly.com/uploads/1/3/1/3/131381991/39b8ec6c5d099e.pdfIn PDF document text
    • https://kogavegi.weebly.com/uploads/1/3/4/8/134873631/zasug.pdfIn PDF document text
    • https://gisevivejomu.weebly.com/uploads/1/3/5/3/135393920/davovapipor_rolaposuzaf_sibudogul.pdfIn PDF document text
    • https://mogalarozo.weebly.com/uploads/1/3/5/9/135968713/5106eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489740/normal_6016fc89f3123.pdfIn PDF document text
    • https://namutaborizelo.weebly.com/uploads/1/3/4/7/134766338/gojezijerebe_rutomimol_xowopa_sixakutew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5fdaabb715c8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8b8d3a-2fe1-4cef-b504-1dfab7cc310d/gozevotagivofeguwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe79e5f7-0937-4763-9a03-217c6faf79a8/philips_voice_tracer_dvt2510_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0c554f-e4b8-4b9d-acb7-306e9f73d611/libro_de_matematicas_4_grado_contestado_pagina_192.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_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 5388 bytes
SHA-256: 5a4e681761a263cf55057b7892f0320283bd2716e93e8cd8831548756f3dfaab
font_01_sfnt_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 12208 bytes
SHA-256: 777da2c9768cb9f7e9c4ccbf3c468581fd6e1151c2eef18112c9b566310421ba

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