Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0fe04ca1d9f4d7…

MALICIOUS

PDF

87.2 KB Created: 2021-04-23 23:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0000319c2c761d3c327b206bdc605c8 SHA-1: 90e990bc954e476849c66db82fdc9db326289f9b SHA-256: eb0fe04ca1d9f4d7505a13d2ace56c7cc177d996e778bc4a3b2e72b8cae4af6f
96 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 an embedded URI pointing to 'resalured.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of embedded URLs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=best+deal+miele+vacuum
    • http://prizinsta365.site/analisis_sobre_la_novela_el_reino_de_este_mundo56o58.pdf
    • https://static.s123-cdn-static.com/uploads/4367920/normal_5ff3c1b1573a9.pdf
    • http://siluvuxifebul.medianewsonline.com/basics_of_programming_in_java.pdf
    • https://cdn-cms.f-static.net/uploads/4482629/normal_6028816774eb8.pdf
    • http://putededojijubo.iblogger.org/is_google_my_maps_free.pdf
    • https://cdn-cms.f-static.net/uploads/4501965/normal_6048be0bb2a10.pdf
    • https://cdn-cms.f-static.net/uploads/4469353/normal_6011aa2e35dc0.pdf
    • http://ewop.space/sociology_books_in_marathi_downloadj39z5.pdf
    • http://viwafuxofiseko.getenjoyment.net/antrenmanlarla_geometri_2._kitap.pdf
    • https://cdn-cms.f-static.net/uploads/4449178/normal_6048347283767.pdf
    • https://cdn-cms.f-static.net/uploads/4470228/normal_6035c526e0aef.pdf
    • http://sukotis.iblogger.org/30530679945.pdf
    • https://cdn-cms.f-static.net/uploads/4378404/normal_604e8ec775c36.pdf
    • https://cdn-cms.f-static.net/uploads/4415740/normal_606bc3cbd6f86.pdf
    • http://front-glass.space/what_does_tripletail_fish_taste_like0k5gv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nonogopikizezed.rf.gd/lewis_dot_structures_chemistry_worksheet.pdf
    • https://s3.amazonaws.com/luropiw/lexin.pdf
    • http://gegurobaz.myartsonline.com/behavior_modification_principles_and_procedures_6th_edition_download.pdf
    • https://s3.amazonaws.com/ragejufa/58342094252.pdf
    • http://zowofiz.myartsonline.com/what_jobs_can_you_get_if_you_study_international_business.pdf
    • http://kiduxoz.epizy.com/jnditemplate_lookup_example.pdf
    • https://s3.amazonaws.com/fovezewi/xedegovuxoduv.pdf
    • http://pitaken.onlinewebshop.net/48794883451.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_off00011a82.bin
90cf8581bfa53b3dc219601c2fb38a1d84f76e10dc6ebbcbbc365d25ba45ab28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A82 5096 bytes
font_01_sfnt_off00012bd3.bin
ef5342eba0c1d95b60d8e60cd1067f8163fb21938f6e31964632de40da6e0a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD3 10532 bytes

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