Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0d37ebb7ee4256…

MALICIOUS

PDF

67.5 KB Created: 2021-01-30 21:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 16ea36f1bc55a17b26cfbb27cbfa5d70 SHA-1: 8644faf330476c5a6d2fd171db06a051a7ff3af9 SHA-256: 1b0d37ebb7ee4256a8423a3a010422922266e78e44d4a531e70f82ad7a6ca3fd
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to 'Newton's law worksheet'. The presence of external URIs and the overall detection by multiple security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=newton%2527s+law+worksheet PDF link annotation
    • https://cdn.sqhk.co/farafakilof/dDhgiha/zombie_derby_2_trainer_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/mjchiid/choppa_locations_fortnite_season_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_600bee1763a6d.pdfIn PDF document text
    • http://prodson.space/8005278974981xn.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jhdyjhV/bovada_presidential_odds_2016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5ff91fa1d275e.pdfIn PDF document text
    • http://ca-management.website/fury_roads_survivor_die_karaokexotrh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455645/normal_5fda77dd828e1.pdfIn PDF document text
    • http://italia-doc.space/628290278481ls35.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/setigafat/confidentiality_undertaking_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/balance_sheet_all_components.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/davexumagi.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/bloody_roar_4_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/guarantor_rent_template.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/nubugenowizawiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/cyrano_de_bergerac_ita.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_off0000cb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9B 4932 bytes
SHA-256: 35f32d28637d369db47ddb83d5e118eee2c52a218f94b49ee78f630546af5c7a
font_01_sfnt_off0000dc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC77 10344 bytes
SHA-256: 24b0edee81418dcc10dd8fffbbd1595220c84fb04925e7138500d4e8dfca91ad