Malicious PDF — malware analysis report

Static analysis result for SHA-256 59eeef8b8b7bb155…

MALICIOUS

PDF

118.3 KB Created: 2021-03-17 04:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a8519e4dee6b5172c8cadc2780df3f1c SHA-1: a1ea187af2fea3ac6f3e3ef72f477bb989f1e1f6 SHA-256: 59eeef8b8b7bb155c76c8b35a3a7bfd0de43748c8ce51ce2f364a862bd0bfa77
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 a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to lead the user to a phishing or malware distribution page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=how+to+pronounce+the+weird+b+in+german PDF link annotation
    • http://vedivux.mygamesonline.org/definition_of_stress_by_different_authors.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/5geihhc/las_vegas_tourism_news.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/what_is_a_calorie_deficit_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/e3gjhgg/warm_fireball_drink_recipes.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/lesson_7.1_skills_practice_answers_key_geometry.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/bukelagawibapogijuxufeli.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/edit_text_osx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_6026aad1d83d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5ffdc5907de41.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/gjhjBhh/kerawuvijukudilojaxug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fee17b4be74f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavatesivo.myartsonline.com/que_es_el_control_de_calidad_total.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/63333489175.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/iso_9000_quality_management_system_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/37972315919.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/53006987848.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/42520035068.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/88516265399.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/how_much_is_wedgewood_worth.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001651e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1651E 2984 bytes
SHA-256: 7db497ab9db5ee452bb39e16b9b6497974b908d879ba2fd6648bbf2f34210761
font_01_sfnt_off00016fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBD 5472 bytes
SHA-256: f398efa554fff0771f5f58ca8fd321cc739c9ae33335b48ff2e4e3e5e297d77a
font_02_sfnt_off00018236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18236 15500 bytes
SHA-256: 727f2f971cd2ca2fcc8adfe01d8f02d772b12d30ff7b4dbc0ce52214be052051
font_03_sfnt_off0001b331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B331 16184 bytes
SHA-256: 2b2056738891dcce9022ba107c06e39a159808fbd5a446f46d23b3a441126584

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