Malicious PDF — malware analysis report

Static analysis result for SHA-256 c433af62850503d4…

MALICIOUS

PDF

76.5 KB Created: 2021-03-02 01:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0236e3c5b312d5368f0d328a098bbfdb SHA-1: 94476d82e78402da63e312ab31803744baa8ae16 SHA-256: c433af62850503d4b5f604199a07d951df39bf23c99a0e3ae519e959d33f58dc
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result for 'interior design software mac uk', likely intended to trick users into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=interior%20design%20software%20mac%20uk PDF link annotation
    • http://lestyprin.online/mystic_messenger_hourglass_answerseqmrh.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/a_short_guide_to_writing_about_film_9th_edition_ebook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penale/ledavuvisiperodixasufuver.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/traductor_frances_espaol_en_linea_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/wigesidagawatisom.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/offline_niv_bible_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/95715637876.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/kanegemixufidopofejebalet.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/rhyming_words_dictionary_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/aha_cpr_guidelines_2019_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/conservation_of_momentum_in_2_dimensions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/dignity_in_dying_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/lipireluz.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/vamumubusenapeja.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/nuwave_air_fryer_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/grasscutter_farming_business_plan_template.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_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 5404 bytes
SHA-256: 9241b22dcbd9aa1433006cc6936f175743362bcbbdb2627d23b383f4aa74f13d
font_01_sfnt_off0001007f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 10916 bytes
SHA-256: 9d57d66933c63c88dfd105aef785d8f8561d58f40abc18546c12990dc437a6d1

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