Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca017a4f6c4e0840…

MALICIOUS

PDF

31.6 KB Created: 2020-11-04 22:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a1bdee7dc41b781b3bdca4bcbf3b01f1 SHA-1: 152be7890e36507294a89ba3cd42f4bd4d290750 SHA-256: ca017a4f6c4e0840449fb5ef9d202394dcc1398a1c833b6f4d552ee6ecc67e81
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://ggtraff.ru/strik?keyword=dupont+manual+high+school+stacey+wade In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pukiza/everstart_battery_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/marvel_puzzle_quest_free_coins.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/battery_management_system_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/sedimoperabu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/10837983600.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/montreal_canadiens_schedule_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/besufenajobemigaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/broader_perspectives.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/academic_writing_skills_cambridge_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/misisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f334ef4c-b869-4766-8aff-38a7834c314d/besajezerugi.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_off00003ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED6 5584 bytes
SHA-256: ca9d14339bb0c15ca04d25a748e9785ffb356376b519895d54cc9cc59582f067
font_01_sfnt_off000051c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C8 9444 bytes
SHA-256: cd73bd8b593cff526d0808cb3be7571771fba8d1b238c0e922caa4bd27db3a06

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