Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edc19fb847e7227…

MALICIOUS

PDF

43.9 KB Created: 2020-11-03 19:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 04748ddeb80217ede53c8c5c543eebe3 SHA-1: dda5c9d823cea1cdba632f841e3afa2f868266d5 SHA-256: 8edc19fb847e7227088f797c306c5589c86e4968b9d417da73d3669d072eed68
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/123?keyword=rail+of+war+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8d97d4c2470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f892fdf13eea.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/bse_odisha_8th_class_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/55968631838.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/86275023987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a78c72-1846-4f9b-8fff-b6a7d1eccad1/dadopirafobigum.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/21351786379.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/cdac_question_paper_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/3495692904.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gogusezaxewejopusenije.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/77429413782.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_off00006fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 4816 bytes
SHA-256: 02f8806224e96f20d2814c6c40d2d32949d1243dba78ccd26a89d2faf91a6078
font_01_sfnt_off0000802f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 10232 bytes
SHA-256: 7782ed168e3bba550040c58fcda26450a9480bb4118ba08e899f0f4d82dae7f5

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