Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8b4f30542df7b0…

MALICIOUS

PDF

78.4 KB Created: 2020-10-27 05:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f150f6cdbcd61d1327a0ae4efb4e167d SHA-1: d276f7ca62dd2f0f3a0bce955080ebec338f0a59 SHA-256: 1d8b4f30542df7b0d3461b8ec56d6134573ed9ec5c915c46d76eeaad5b619199
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 0.9999

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://cctraff.ru/strik?keyword=dbt+handouts+and+worksheets In PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/color_palette_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/96216452483.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tratamiento_para_acidosis_respiratoria.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/83232143264.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/2582119107.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/difference_between_book_keeping_and_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/baba_balak_nath_ji_chalisa.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/phonology_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/93562123845.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/alkenes_nomenclature.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/kazinakuwofamoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/tubijobuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/76309882302.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/mulajutadonipabelemupem.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/history_of_allelopathy.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/bodhisattva_vow.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/unom_ac_asc_curriculum_design_and_development.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/bv_doshi_books.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/81502766397.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/act_english_grammar_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/64817604603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f15122-0ea8-4bba-a346-dd3a5ac9cd6c/bavarovifarugage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38308f88-c21d-4cc8-b794-f2546d45945d/core_connections_integrated_1_answer.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000dcca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDCCA 14844 bytes
SHA-256: bdd51418d56d15f477d70ee9b3066e8f436c641b6f28e0a10d7bfca97834fceb
font_00_sfnt_off0000cb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB37 5176 bytes
SHA-256: 229ba546824db9fd8be1bc24f32f886d047f662f6fe5a57e498d803ee70b6826
font_02_sfnt_off000105be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BE 11028 bytes
SHA-256: c927527361060945621ddfc5612d9031cbda9cc5537a5888d16b6300f5c74d56

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