Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4274f316f76546…

MALICIOUS

PDF

41.6 KB Created: 2020-10-01 21:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d709c18df7d9b192e3ffcdf8fe99d140 SHA-1: 40d6f322a606cdbd59a180adbffc20afda64bf06 SHA-256: 6e4274f316f76546cfc0dd9c63ef23ac2197cd789becfeabeac6449eb2366774
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://cctraff.ru/strik?keyword=la+cuidad+de+las+bestias In PDF document text
    • http://files.thevibrantauthor.com/uploads/1/3/0/9/130969209/rikufalixa.pdfIn PDF document text
    • http://papus.epiphroncapitalgroup.com/uploads/1/3/0/8/130874523/pimopimabejilomalur.pdfIn PDF document text
    • http://files.tracyvogtdesigns.com/uploads/1/3/0/7/130776446/widokavatopu-divetat-danizexedaz.pdfIn PDF document text
    • http://pimisafe.seeyarealsoontravel.com/uploads/1/3/0/8/130874617/gebikalali-zopisademixem-fogisifox-mopusesazotuf.pdfIn PDF document text
    • http://files.juliajawor.com/uploads/1/3/0/7/130739971/numod.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/1/0486/1925/8021/files/dieta_facil_y_rapida_para_perder_barriga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/150_gallon_aquarium_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/31958860779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4693/2132/files/fexipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6701/5335/files/gurudozizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7907/6507/files/litofokebokopibonibatuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3286/5699/files/shocking_tranq_dart_spawn_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1968/5016/files/what_is_species_population_and_community.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/72825236983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8934/0832/files/nelson_mandela_a_long_walk_to_freedom_class_10_summary.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_off00006432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 4920 bytes
SHA-256: 2767acbc479dd6fbe9cbecd367c5002c4a4f70f6919c291d246396e23580a1b6
font_01_sfnt_off000074fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 10712 bytes
SHA-256: 31523210505932e64df9ec5c0e40e9dbf05f2f005672988b3a090c0eb42870b4

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