Malicious PDF — malware analysis report

Static analysis result for SHA-256 0635cdd0f80a2031…

MALICIOUS

PDF

76.3 KB Created: 2021-05-05 18:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 548f3b6430645f122df4f4dd4729e3b3 SHA-1: b38bc227a3201d6749f3d76ba9b12e463c438928 SHA-256: 0635cdd0f80a203152bb6baa8b266294da19e2d6dcd10df2ca5dd111126729dd
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://vilenefex.ru/strik?utm_term=sailor%2527s+creed+navy+dep` is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=sailor%2527s+creed+navy+dep
    • http://xugutolajon.22web.org/lozusevewelezeg.pdf
    • http://kijejakedaje.22web.org/13075422256.pdf
    • https://cdn-cms.f-static.net/uploads/4418362/normal_604d1b24663cc.pdf
    • https://cdn-cms.f-static.net/uploads/4447265/normal_60354d8b07397.pdf
    • https://cdn-cms.f-static.net/uploads/4484122/normal_6026a6009d022.pdf
    • https://cdn-cms.f-static.net/uploads/4490244/normal_606d2513ef942.pdf
    • https://static.s123-cdn-static.com/uploads/4464521/normal_6004ff0c1b468.pdf
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5fd66a449f06a.pdf
    • http://kikaxefe.22web.org/29649915662.pdf
    • http://rawiduti.medianewsonline.com/pekojuveloso.pdf
    • https://cdn-cms.f-static.net/uploads/4369647/normal_6059bc0544e1e.pdf
    • http://tarekupi.scienceontheweb.net/21921325456.pdf
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6064dca23f052.pdf
    • https://cdn-cms.f-static.net/uploads/4475197/normal_60621d86b73eb.pdf
    • https://cdn-cms.f-static.net/uploads/4414871/normal_605a6b146ccd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zexaxoneda.epizy.com/candlestick_chart_download.pdf
    • http://lulotekoxinemaz.epizy.com/definisi_autisme.pdf
    • http://xuxinubobizet.epizy.com/workplace_spirituality_scale.pdf
    • http://gurepabe.epizy.com/intensive_care_unit_guidelines.pdf
    • http://vurutezezus.rf.gd/bobbi_brown_makeup_artist_jobs.pdf
    • http://zibakogemigana.rf.gd/6908674970.pdf
    • http://mavafakubew.epizy.com/chemistry_objective_questions_and_answers_class_9.pdf
    • http://fepadegan.epizy.com/fafonubog.pdf
    • http://lewinozed.atwebpages.com/biogas_power_plant_design.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6e.bin
abf979cdbc3b1ab35183788584044906404b1abdb486c21107cc7baf9b7b05f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 5368 bytes
font_01_sfnt_off0000ffcf.bin
bd3bd5fd8b742f93946e69d3e1f6040c7916543d9c74ffc245c10b8cf8aff443
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 10560 bytes