Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1271a86375ab7e9…

MALICIOUS

PDF

47.6 KB Created: 2020-10-18 16:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 921b1d8f386cdad39464010f7517512f SHA-1: 3d81b62928b3409d00259a666a0f9e6db7c3ccfd SHA-256: c1271a86375ab7e9454efa1506d5b619dff1de64a95d8b76ca896c60f3b5ad24
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/123?keyword=gigabyte+aorus+x370+gaming+5+manual In PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/bizerokiva.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/veliwuji-juderekevasaxa-lamexita.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/vokelunewej_wedezeregen_lejofe.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/sesum_vibewowevumak_xadimuz.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/zinoxovij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f873b0865b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f88f35ee3c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f8a4f25a18dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8c1cb52120d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f88876033c6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8470/5699/files/rough_green_snake_care.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1572/0093/files/adventures_in_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5208/6934/files/chippewa_falls_middle_school_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4519/8237/files/21164009072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0250/3583/files/tovomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9784/0539/files/xamoragu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5062/2872/files/3960869606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8597/4689/files/manga_for_the_beginner_kawaii.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6775 5740 bytes
SHA-256: 11b5f99e8150f4812372b058df111a3680ed17e3cb0c3b87111bcfea54ef6acb
font_01_sfnt_off00007b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 12360 bytes
SHA-256: a76e3ff9dd18dfc787d7667660787380cdebddc5dd974a099fa5a94fb3805138
font_02_sfnt_off0000a27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA27D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f