Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0db14a2776d2d7…

MALICIOUS

PDF

91.3 KB Created: 2021-05-20 01:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5a5031c973efadfede64fbf0ad104655 SHA-1: 29ba388dc23d55b7ee43f44f9475d5ee684cb2f9 SHA-256: 3f0db14a2776d2d7256346948ae85431fdc196fde3e69dd5174bf6c19f7093fc
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=descargar+pokemon+blanco+2+para+drastic+en+espa%25C3%25B1ol PDF link annotation
    • https://bimuwalunamen.weebly.com/uploads/1/3/1/3/131384226/6291388.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/vubovepusabumizu.pdfIn PDF document text
    • https://bopilewe.weebly.com/uploads/1/3/4/5/134523270/1726262.pdfIn PDF document text
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/fivakiw.pdfIn PDF document text
    • http://www.linkbucks.com/pORbIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejobu/25545031538.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/auditoria_informatica_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/21768131243.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/fukesurejobobobo.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/2683887250.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/pudozoxutokikuxavato.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/white_knight_chalkboard_paint_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/xowodotibakake.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/66974067581.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/festival_d_avignon_2019_programme.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/fewodetubapizitakuju.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/noughts_and_crosses_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/jotaxikusixomuxepe.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/unified_carrier_registration_form_year_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/57060812497.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/grossing_up_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/free_printable_4th_grade_reading_comprehension_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/15659078642.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/rebelion_en_la_granja_personajes_historicos.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/astro_compass_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/57120941944.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_off00011d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0B 5940 bytes
SHA-256: 627cc12bd31d512c481fbdba8c86d819b87b6935cd0284be804b85b620613125
font_01_sfnt_off000130f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F4 14388 bytes
SHA-256: 1cbbfae226ff0bf52729c6a5a8847355b61f748b253897601c671aac529c834c

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