Malicious PDF — malware analysis report

Static analysis result for SHA-256 637e62b4677b3f08…

MALICIOUS

PDF

49.9 KB Created: 2020-11-01 10:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: efdbed910d19aad5652087de0efe8a7d SHA-1: d1eaf1e181f2523a351f3f27f931d80b041e998d SHA-256: 637e62b4677b3f08bcb95081cb30ae50831a4888525c50150dd54dc2dce5a782
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://cctraff.ru/aws?keyword=sonic+the+hedgehog+bike+helmet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8cfc80a4b32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8c6297aea85.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/ratozegesigikova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f91801c8dc78.pdfIn PDF document text
    • https://weratirotiset.weebly.com/uploads/1/3/4/3/134322017/judajugufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/eureka_math_pacing_guide_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/10963688791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8410/1790/files/biogas_project_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/auditor_fiscal_da_receita_federal_edital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/3073/7830/files/ymusic_premium_apk_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0695/6970/files/zutowakimenofegesivelisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3074/1660/files/repeated_addition_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/mopejezowejunubuvuzeku.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/ap_biology_reading_guide_chapter_17_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/burris_speed_bead_mount.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

Related samples 5

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
font_00_sfnt_off00007857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 4964 bytes
SHA-256: fffab7f3a1e8eb59bf66f76364c265df7b470c5049fe4b78505c002c18fad7bb
font_01_sfnt_off00008905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8905 10360 bytes
SHA-256: 0b8b5d1e25167cca8af4bfa5935ce3c01db20abf8a27cc91a5f5ab9761a7d64e
font_02_sfnt_off0000ac30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC30 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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