Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc3b742f73c0662…

MALICIOUS

PDF

77.8 KB Created: 2021-04-07 02:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 47675759c8ad7aa92e42e06aae46676b SHA-1: 54fac2ada00c6f89728ef92319cb648f27f54d4e SHA-256: 8cc3b742f73c0662cffa2ecc9ff40b077e66c5ad9500c0c8371eef940708ea4c
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 0.9998

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://fokemale.ru/strik?utm_term=jbl+xtreme+2+portable+bluetooth+speaker+in+midnight+black PDF link annotation
    • http://palopej.sportsontheweb.net/basic_unix_commands_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kiwapipu/hbvhfjg/85050782971.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/KhegEge/16870503210.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/5834027264.pdfIn PDF document text
    • https://cdn.sqhk.co/joraxeneli/iGjjgwz/xoxusujit.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/wivunonovef/all_bollywood_movie_mkv_300mb.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_26b36c48783e465d9d4b5c3a48494dff.pdf?index=trueIn PDF document text
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_77aed901d564442fbc927aeb9c71fca8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17913b9-84b6-44aa-9fbf-17ede6946032/how_much_does_it_cost_to_hire_a_lawyer_for_a_business.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/188bet_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/rubber_gasket_material_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/listening_skills_activities_for_grade_1.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/baixar_livro_de_parasitologia_humana_neves.pdfIn PDF document text
    • http://litemulum.rf.gd/kuterabenomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e26ac02-9df6-4186-aae4-c4e1177551bb/wovidatodosevebilenerig.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_a4d8bb3ed4a74cf3af42f08a10018bfc.pdf?index=trueIn PDF document text
    • http://tefolinum.epizy.com/55209482920.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/frigidaire_ffad7033r1_70_pint_dehumidifier_reviews.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/medicinal_plants_and_its_uses.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_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 5880 bytes
SHA-256: 1be7543f5393a6a53c5346f6a35c18d5c0be92861d40ae83e43ffe0780895150
font_01_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 10976 bytes
SHA-256: 026ca39918020e4e9ada9e83f9ceb53551a3f9186fea66fa7892818a019b17ac

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