Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a590419132baa8a…

MALICIOUS

PDF

47.0 KB Created: 2020-10-25 03:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 67a4e728dbfc2359f7a08326ce63b98f SHA-1: b246d94dcd99d4c97b8527bf22f65a4923011c54 SHA-256: 9a590419132baa8aa0e332870154dead6b424613c76227408c4aa8845e1baaf7
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.me/aws?keyword=interim+budget+2019+pdf+affairscloud In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5f9358b344673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f8f719a7e5a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f8ea16262f1a.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/jaxava_fujopuwif_nutep.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/mebofogebuleziwop.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007798.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007798.bin)
    • https://s3.amazonaws.com/retobifulipo/ritibog.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/polycythemia_in_neonates.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/analysis_of_financial_statements_project.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/86034809546.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/convert_base64_to_file_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7937/3478/files/properties_of_antigen_and_antibody.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3960/0021/files/pukesepiwinazezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/witanomekenemudegigato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2626/7291/files/97507947728.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/97525962479.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/pdf_livro_auto_estima.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/adobe_reader_apk_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/nafewofakovedegakak.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/how_to_use_multimeter_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8917/5746/files/dullahan_smt_iv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/app_para_peliculas_gratis_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/mid_chapter_checkpoint_chapter_9_answers_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9114/1801/files/devoxalifudinazakovux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0608/9640/files/variables_and_expressions_worksheets_7th_grade.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 extracted file (font_00_sfnt_off00007798.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 6032 bytes
SHA-256: dbc2b2091fb573d4d58514e578b2c0fc535917de558ddeb1bbfb09f413270a25
font_01_sfnt_off00008c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0A 9912 bytes
SHA-256: fb99e623782b3da434848130cd3f50a431d98699937cc901888066dd23dcd887