Malicious PDF — malware analysis report

Static analysis result for SHA-256 9020e0e3462b1535…

MALICIOUS

PDF

77.8 KB Created: 2021-06-04 18:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ff83c3de20c9820008899f5dbf3475e6 SHA-1: 2a713d7b61d88d33c7d5cba4bd2bda2afebdcb2f SHA-256: 9020e0e3462b1535c10ed0f3fde42d3d452d516a78f5edd3bdc2c9764b36f082
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external links pointing to various domains, including disposable hosting services. The primary URL, https://oniceh.ru/pbw?utm_term=clasicismo+romanticismo+y+modernismo+wikipedia, suggests a potential SEO manipulation or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://oniceh.ru/pbw?utm_term=clasicismo+romanticismo+y+modernismo+wikipedia PDF link annotation
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/b635a.pdfIn PDF document text
    • https://zifusiwi.weebly.com/uploads/1/3/4/6/134686012/gejadotemag.pdfIn PDF document text
    • https://xasamaxubema.weebly.com/uploads/1/3/5/3/135387487/863761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_60b7c89dd0231.pdfIn PDF document text
    • https://nawomabikovuz.weebly.com/uploads/1/3/4/7/134730946/dopedegibu_dejebiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_6050d158a888e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_60472c81b7cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_602d3119d439d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_602631c2595a8.pdfIn PDF document text
    • https://xopezafetuwov.weebly.com/uploads/1/3/5/3/135314897/1421218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_6062c012b3fe8.pdfIn PDF document text
    • https://setowunujabid.weebly.com/uploads/1/3/4/0/134095848/jefawipozanezos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_5fffffc7ae682.pdfIn PDF document text
    • https://suneminus.weebly.com/uploads/1/3/4/5/134529318/1fcef5e9be89c64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_60471d9ae5e8e.pdfIn PDF document text
    • https://wiwazalokapig.weebly.com/uploads/1/3/4/2/134265383/rutisovawupivosoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegoxelaw.pbworks.com/f/kurogabitabixasigar.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144476004/ap_bio_neuron_function_pogil_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5126fbd-e109-4983-a749-9c02964545b1/emergent_strategy_in_marketing_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5875f25d-3e9c-4062-9cc4-84cd73c4a394/30147448598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80895a6-5a68-4d0b-bff1-7156805bf2ad/navudasekijororofe.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/what_is_isentropic_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6681c0a9-7223-46ee-a6cc-6663e3fce356/wabage.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_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 5384 bytes
SHA-256: 711680a1fb91f3d0e501fe42aa248a13484f7c2e399aba66a384d5113c391801
font_01_sfnt_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 11608 bytes
SHA-256: 20824d0e217e3b99a895bbeb98208bcb910bbecd402fa7af3b264fcffe233054