Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0572f33a9acb1b…

MALICIOUS

PDF

77.2 KB Created: 2021-04-28 21:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b3e39f96930a46c190db73ccdbf37baf SHA-1: aef2b425b109550c32ef87cb80942fc0010cb5d6 SHA-256: 5f0572f33a9acb1b4a5226743eccfbda802b7cb66753ab8f424793e850baee80
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'bologen.ru' and another to 'binuwuzipu.myartsonline.com'. The document body, though heavily obfuscated, appears to reference product information, suggesting a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bologen.ru/strik?utm_term=soleus+air+8+000+btu+saddle+window+air+conditioner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481397/normal_601b8da69ec3a.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/gidalureguder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5fd10f270205e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://binuwuzipu.myartsonline.com/jokuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3714708a-6e53-4975-8c6e-32c8290d612c/mexowinazojaxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/solucionario_probabilidad_y_estadistica_walpole.pdfIn PDF document text
    • http://pisibagavorinow.epizy.com/borufejuweve.pdfIn PDF document text
    • http://sutakepaxiru.epizy.com/bsava_manual_of_small_animal_anesthesia_and_analgesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758b2d79-4082-417d-b22e-2661929c2de6/what_does_a_chucky_doll_represent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcae3836-1ac1-4bea-a367-e441d412eb4d/1536671779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e0926e-3bfe-4146-8e29-66ed1f497daa/hermann_hesse_demian_analisis.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/ximufimokebumitab.pdfIn PDF document text
    • http://laxunuwozen.epizy.com/phone_interview_invitation_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e005fa5-67c6-46f0-9c74-a3faedbc852f/bohemian_rhapsody_virtual_piano_sheet_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a36856-1b7b-452f-a32a-fc4c5fdaa8fc/xazataze.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/17222912594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691f7eb1-2af3-4eb9-9c8f-97d9920c5419/on_page_seo_techniques_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d113a284-0634-4c41-9679-ebd1a764a081/xidiledusuvunosojitixanup.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_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 5604 bytes
SHA-256: 1324603f5303a094c90018398593aba824d6346829f7a7d8c121dd633d8bd6e2
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 10812 bytes
SHA-256: e123dee0280eb1ceff0770bca2dbcd2f156c8b48be0e1a7c82a698cdffae93c0

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