Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcbdd0a47175dfb…

MALICIOUS

PDF

36.1 KB Created: 2020-10-31 19:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f9b4bb294ac43327c5dcbb5fc17aed41 SHA-1: 983670d93e124654edb035c64bfa0d02f3a286f9 SHA-256: 0bcbdd0a47175dfb9da84c1e9c87ec4159e3224a242bb67fdc74553222fa8a0a
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=riddle+brook+school+lunch+menu In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/33692406705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65776826-d7de-4260-8b82-1e8777c7885d/13650711380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbeb975-1b0e-4e31-bc0f-db0229c4ed61/jovaxokolototowidaxader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe81c5e-b3e6-45af-9776-48502ae167d7/fedotizaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8884/5231/files/1_corinthians_bible_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/nulutaxepox.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kptcl_recruitment_2019_notification_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5634a806-e207-48ff-9f28-b77181f72587/lexmark_5600_to_6600_driver_download_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/22371683992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4779/2021/files/medical_certificate_form_tamilnadu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/young_ones_of_animals_and_birds.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/wimunisilegofutanawo.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_off00004fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC7 5180 bytes
SHA-256: b75c2f9e4affc052d7476de1da344f12a3b5d2ee7e0bac72e421caaa5fb0d39b
font_01_sfnt_off00006141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 10156 bytes
SHA-256: e9fc3d67be47bae3813b1dff09abc4f9bf2e8c5e3fc557e80ce5bdb8e2fdd292

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