Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee45d310943d0ed9…

MALICIOUS

PDF

78.9 KB Created: 2021-03-17 11:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 40207c6b781865b6c87553bd40f7e1ce SHA-1: a84213d0edaa7a4623fb912a3ff541e475da8eca SHA-256: ee45d310943d0ed9dd4bd2672ce4034860e135d337e6c54b225201d836664265
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 pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious sites for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/123?utm_term=john+wick+3+parabellum+parents+guide PDF link annotation
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/5644526.pdfIn PDF document text
    • http://vegunax.getenjoyment.net/40851765257.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/how_to_install_a_honeywell_thermostat_heat_only.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383924/normal_5ff6bec86b494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_602fde25323c7.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/2048164.pdfIn PDF document text
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/wazuzinasaruf-matej-tuwalaratavadop.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/tabla_de_conversion_de_pulgadas_a_milimetros.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/egjpjjw/57808282513.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/heggO9B/black_hole_eating_a_star_nasa_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/3jcFhgu/bedroom_dresser_ideas_pinterest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_601b772fde522.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/780689dbb9d92c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvituze.epizy.com/82919614034.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/tableau_calculated_field_change_date_format.pdfIn PDF document text
    • http://fidobagasamos.epizy.com/53055858517.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/how_to_engage_students_during_distance_learning.pdfIn PDF document text
    • http://titomozuluvexov.epizy.com/verbal_ability_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/billed_customers_2400_for_services_performed.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_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 5936 bytes
SHA-256: 8a397936412112bef17644352e665ea1911a9e1972299f6db7b7b7d491c97b86
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 11308 bytes
SHA-256: 255273cbd6b565388d9ea23d4cd552911bfd75a05d8f0779b294ecc8d5d5e996

Open this report in the interactive analyzer, or submit your own file for analysis.