Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f1b1650006b79f…

MALICIOUS

PDF

81.0 KB Created: 2021-05-20 23:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e86dff8d28c2e9dc81dee82d61a4f7f5 SHA-1: 9793ffd976c359ee53e4b57f9e2d0a5fce4f3761 SHA-256: 43f1b1650006b79f03291fd786eb5d07ccd98b48248d1d99859f4a2176a60a9b
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 0.9990

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://dugedepap.ru/strik?utm_term=livro+pensamento+lateral+pdf PDF link annotation
    • https://dawunatebebi.weebly.com/uploads/1/3/1/4/131408224/kujexudubob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408464/normal_5fccd64eee100.pdfIn PDF document text
    • https://xowetigebunagu.weebly.com/uploads/1/3/1/6/131637365/zebenedokerewanima.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/sopud-refivo-sipopopatolos-pexakovor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446782/normal_5fda1807df448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_606b6444b3b7d.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/6f6b26766640194.pdfIn PDF document text
    • https://polupamenutotuk.weebly.com/uploads/1/3/5/3/135334754/8091929.pdfIn PDF document text
    • https://supuniwugi.weebly.com/uploads/1/3/5/3/135317388/9302010.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/felowiteku-zozimifadejin-jajag.pdfIn PDF document text
    • https://zijananuwale.weebly.com/uploads/1/3/4/4/134438714/cfe1ae9b1aa.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/7141732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5fc7303697e4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409610/normal_5ff8ae981df68.pdfIn PDF document text
    • https://vidisuxusa.weebly.com/uploads/1/3/1/6/131606291/5600285.pdfIn PDF document text
    • https://givudaxoj.weebly.com/uploads/1/3/4/4/134490896/6221653.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/tikofaketonub/18934150780.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/properties_of_exponents_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917eb363-d0b1-42fc-89fe-5f3427109f23/rowawefonisivolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cac3311-2509-4872-affb-e6c53814ca8e/funny_persuasive_speech_topics_for_high_school_students.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/how_to_stretch_back_for_flexibility.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/best_free_graphic_design_courses_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994bb0c5-cb91-4e7e-ba44-136b7730b2c7/26044911171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909e8a02-1e09-4553-965a-0bd0488a9ff4/how_to_analyze_the_risk_management.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/69346955963.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_off0000fb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 5188 bytes
SHA-256: acb597ee27a92924117e3c6455eecd9a8b197733538b0fc09da3edf956f4b437
font_01_sfnt_off00010cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAE 13080 bytes
SHA-256: 706dc89f2986049ac2b6d674ab8c7bbf78ffb0454c67ced20c91bbae4fbff066

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