Malicious PDF — malware analysis report

Static analysis result for SHA-256 056984fdf0f54a9d…

MALICIOUS

PDF

79.7 KB Created: 2021-03-30 13:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: da9360eff6e0ddb7a1a05943566a8300 SHA-1: c03ba9b0a33a290ed9a6be564be9c34d3124d43f SHA-256: 056984fdf0f54a9dc40909fe7993e66c46bacbdfb3d2cf966212e67a6b9d96f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as link farms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=livro+barra+de+access+pdf+gratis PDF link annotation
    • http://fullcreditreport.info/94748303815eazv7.pdfIn PDF document text
    • http://effektzhizni.ru/xazewujofilulizopurifelmipc.pdfIn PDF document text
    • https://xaverawigidun.weebly.com/uploads/1/3/4/4/134437914/20c2191.pdfIn PDF document text
    • http://gobozexi.iblogger.org/mathematics_grade_12_statistics.pdfIn PDF document text
    • http://grinallex.shop/564504185655pctq.pdfIn PDF document text
    • http://creditreportfast.info/599549136675edc2.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/best_spanish_books_in_englishoiv6w.pdfIn PDF document text
    • http://fherixq.com/agreement_between_owner_and_contractgwisv.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/dc13318c6d6139b.pdfIn PDF document text
    • http://fishland.store/danby_countertop_dishwasher_partszpr8a.pdfIn PDF document text
    • http://swiss-gear-top.xyz/78783282185bj9aq.pdfIn PDF document text
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/121c6d4624.pdfIn PDF document text
    • http://nicepics.xyz/plague_inc_simian_flu_normal_guideq8dxd.pdfIn PDF document text
    • http://nesobaka3.xyz/sword_art_online_alicization_best_characters4z74w.pdfIn PDF document text
    • https://nuzoligul.weebly.com/uploads/1/3/3/9/133997434/8b027e44b.pdfIn PDF document text
    • http://santecmb-sarl.com/ranasomepigomimubegeke6go7j.pdfIn PDF document text
    • https://japipimimobuxi.weebly.com/uploads/1/3/1/0/131071183/zifaruzafun.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/nijudow/project_activity_network_diagram_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/tilukuxamolar.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/jamuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/how_to_calculate_a1c_from_average_blood_sugar.pdfIn PDF document text
    • http://vopipewulowapa.rf.gd/57938978635.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_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 5432 bytes
SHA-256: 6781f95ff9394e22b67b69802afef77d1fbcd57092018726cf58a5737f660cfe
font_01_sfnt_off0001072e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072E 13200 bytes
SHA-256: f3aad99dbed6a998f51ee9af043116474b154906a5463d8382f6f9b6a6a4d135

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