Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8af23832ef32d4d…

MALICIOUS

PDF

65.5 KB Created: 2021-02-02 07:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e1a82835267cc658df70e3c1bcf636e3 SHA-1: d4fc10ee80303125919e1d0f7070c8e35e4b8b14 SHA-256: c8af23832ef32d4dc529bb07e848e70384eff700c840ae6250ccf2e808c4ad17
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 URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'kings mountain intermediate school staff', suggesting a targeted lure.

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://jottigo.ru/123?utm_term=kings+mountain+intermediate+school+staff PDF link annotation
    • http://wisopenudaris.22web.org/printable_certificates_of_achievement_templates.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/9ed21ca6f37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_600529a26e143.pdfIn PDF document text
    • https://funosojo.weebly.com/uploads/1/3/5/3/135336125/72a5692e.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/iahdsie/greatest_hits_radio_frequency_london.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/Ghg9GNp/skins_netflix_movie_cast.pdfIn PDF document text
    • http://petazizol.iblogger.org/cities_skylines_guide_layout.pdfIn PDF document text
    • https://gedepavo.weebly.com/uploads/1/3/5/3/135391693/9835878.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/tokudapele/ikea_kitchen_planner_uk.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/zoboxaxufireko.pdfIn PDF document text
    • http://redepulevinevux.epizy.com/printable_paper_bag_puppet_templates.pdfIn PDF document text
    • http://vobujilub.epizy.com/61501716821.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/biology_textbook_class_12th.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/vabig.pdfIn PDF document text
    • http://wawutanow.epizy.com/baixar_jogo_de_motocross_para_android_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/chalte_chalte_full_movie_free_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/algebraic_equations_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/67039107570.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_off0000c330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC330 5404 bytes
SHA-256: 817532ea80cea7873950755d5b7721beade7e5eb50250c183a7ae62083aad228
font_01_sfnt_off0000d56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 10344 bytes
SHA-256: 2ae91ddbedcf62aa15facb9d13d7b81eecd9e81e2bd320712214a75058f203e1

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