Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b81add1889b134…

MALICIOUS

PDF

81.3 KB Created: 2021-04-27 00:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2f05bdf99558f12d8b759c5a81b8c3b3 SHA-1: e86cff5b1ab74c9d0a0a987a5602e465fcac5237 SHA-256: 96b81add1889b134de0f36adfd84c60f90e5d7626b6124d675ee8b5e519870c2
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The embedded URL 'https://dugedepap.ru/strik?utm_term=fight+club+2+movie' and the presence of many other PDF links point towards a campaign designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://dugedepap.ru/strik?utm_term=fight+club+2+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fcfb2ba67e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_602dad351ffe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_6008b1142f16c.pdfIn PDF document text
    • http://hookup153.site/barnett_vortex_compound_bow_19-45_lbugxo0.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/jbogJLI/virus_wars_beginning_game_hacked.pdfIn PDF document text
    • http://flowerport.shop/moniciones_domingo_xviii_del_tiempo_ordinario_ciclo_cglxvx.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/Fjgij0r/20194996469.pdfIn PDF document text
    • https://poxomovuru.weebly.com/uploads/1/3/1/3/131381772/wujogenedatajuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/Miehhhd/94762235737.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/7629126.pdfIn PDF document text
    • https://nuliludozaremul.weebly.com/uploads/1/3/4/8/134887499/soserefak.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/jggcLai/bemanegokafubun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fe6b9ca046b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_601ec8a058b07.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/jaYefP6/meviwebu.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/vixano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_eaf9e4c183fe47c5bf0f4d101aa38760.pdf?index=trueIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_4f99673d33294d2bb231499a67a380ff.pdf?index=trueIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_9bfd54292e384a8db71ce8155b1d698c.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_e3f5b3892bbb490f853abe8683d6e90d.pdf?index=trueIn PDF document text
    • http://zilazop.rf.gd/azonnali_hatly_felmonds_minta.pdfIn PDF document text
    • http://levewome.epizy.com/wiwomu.pdfIn PDF document text
    • http://vuxijupobagaf.epizy.com/inference_worksheets_7th_grade.pdfIn PDF document text
    • http://vavinarel.rf.gd/55975685757.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_7c9e84e553754c15b3d1bfc56077aad3.pdf?index=trueIn PDF document text
    • http://tejojode.rf.gd/4048549800.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_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 5016 bytes
SHA-256: fe91561b4b628f58c75ddb304aa43c5cd95f7532ed37c7946f77777a3d648f01
font_01_sfnt_off000112d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D2 11068 bytes
SHA-256: ceb6b453ceab5488990e2ce7a3e7cdb8f34e80f104dbd2f9ca6f03ca1c4be815