Malicious PDF — malware analysis report

Static analysis result for SHA-256 37214c3f34b42839…

MALICIOUS

PDF

72.8 KB Created: 2021-05-22 23:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c1f8f76e816b77fcf35af6ff816c56dd SHA-1: 75ba66327561459e08fe37f893cd8777d523ccb1 SHA-256: 37214c3f34b42839346be2623f71ffa671ea2e73112f1a4e4608cb9cb692bbfc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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://vilenefex.ru/strik?utm_term=mpow+bluetooth+earbuds+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445104/normal_6057add7dceef.pdfIn PDF document text
    • https://wojizenufojanog.weebly.com/uploads/1/3/4/7/134724603/f657e094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5ffb043b48b24.pdfIn PDF document text
    • https://watalixajine.weebly.com/uploads/1/3/4/6/134635748/vovoxanetofisaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fd949c95834d.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/bilomubudadak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_605f753ac4b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_606a7a14ce9f8.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/miwolezedubujoz/examiners_report_cambridge_a_level_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/mejores_cursos_de_ingles_gratis_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bogitafifasesudasul.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/fm18_keep_scout_reports_up_to_date.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/cash_analysis_book_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/tilekejasi.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/english_speaking_course_video_lectures.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/witokowejatonaketuwixag.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/brasso_metal_polish_safety_data_sheet_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/xiriraxiler.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/attila_total_war_steam_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/darkroom_booth_3_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/62089230328.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/lofavarawofiwoxefojuxitob.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/fosixig.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_off0000df09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF09 5400 bytes
SHA-256: 67de932be7d198706aeaf06bf74d747c26b44a310fbc7a7ad0450239a5587729
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 10896 bytes
SHA-256: f589e0e3ad8a26991277d31a13f5714f964896a999fcb10fc43f8e887e9069c8

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