Malicious PDF — malware analysis report

Static analysis result for SHA-256 04048829ae19d189…

MALICIOUS

PDF

53.4 KB Created: 2020-10-07 07:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 540ee7c359f2481dc449b26d6f9a0974 SHA-1: e2b8e258b3eeadc1565634ef91e546b417e03aeb SHA-256: 04048829ae19d18920820c2b4dbe04360ad96ebfcf75cc7dc2486a485d0ae0ad
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=maplestory+2+striker+guide In PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/59900881552.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/18730661126.pdfIn PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/46556652595.pdfIn PDF document text
    • https://site-1038583.mozfiles.com/files/1038583/47929092976.pdfIn PDF document text
    • http://bejeli.madebeautifulbyscars.com/uploads/1/3/1/6/131606343/dobowavo.pdfIn PDF document text
    • http://files.costaballenamanagement.com/uploads/1/3/2/6/132681479/xegivol_wunigevuduwupa.pdfIn PDF document text
    • http://files.sdipromotions.com/uploads/1/3/1/3/131381078/jeziledasike_lenejom_sojodux.pdfIn PDF document text
    • http://files.massrealestatewholesalers.com/uploads/1/3/1/4/131454523/863b2459.pdfIn 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/1/0435/3631/8616/files/92134456636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2507/3829/files/darigitaxomumot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/d_link_dir_628_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6501/4432/files/holland_central_school_faculty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0374/8247/files/history_book_club_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5624/2344/files/tally_chart_worksheets_grade_5.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D04 9768 bytes
SHA-256: 1d9b7e74eab60184d3b7acb5081b846187957934636a2409151406a65acc5bfa
font_01_sfnt_off00007c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C03 5432 bytes
SHA-256: 7dc3242e2920e33a69065ec9d694bd12af27d6fa9193c4cda829b5c1677fe33f
font_02_sfnt_off00008ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA7 10152 bytes
SHA-256: 8fec168d03bc648e5ac49f37fbe356e9e20d5bd183e4e452d308f60d57f46661
font_03_sfnt_off0000b199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB199 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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