Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a223958336ff8ae…

MALICIOUS

PDF

61.6 KB Created: 2020-10-27 23:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4855e6bfee3c9240e0700a16d71af210 SHA-1: d3e8e2384043c18bab589bdac0a5ef072e85a068 SHA-256: 9a223958336ff8ae7c98ef01442dc88187461d7870cd7f1d38d82aba99027cb8
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?keyword=theory+worksheets+for+beginning+bands+note+and+rest+values In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_5f970c0cc7232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87ab8fba3a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f971373380f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f8dbd22ab57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f9228c78c126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f8aa52086d33.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/tesasubawalozan/associer_plusieurs_fichiers.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/10988993595.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/21408687373.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/39775399712.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/lean_warehouse_management.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/business_english_conversation_lessons.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/grade_1_addition_kumon_math_workbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fuxavupigivu.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/66119239956.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/programa_para_convertir_de_a_word_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/che_guevara_books_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/senorogalav.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/canterbury_tales_the_clerk_s_tale.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/architectural_acoustics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/lytic_and_lysogenic_cycle_of_lambda_phage.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/zukelex.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_off0000afdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDD 5576 bytes
SHA-256: fc1dbc2e4aadbd69d51f99020f0d6417c6427bd1e4a1fa937e68d6a5d1845845
font_01_sfnt_off0000c2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F1 11320 bytes
SHA-256: 483b04407cb6b0af9ae0914f6d1abc1dcef64b45a94a97e84eb5f80ec59f1205

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