Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b6cd23fe931d7f…

MALICIOUS

PDF

45.2 KB Created: 2020-11-08 23:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: b8d4b8de198c1d0f0e20f56945b2dddc SHA-1: dbea950436eaca78d803fd617bb26b5eace70ee0 SHA-256: 26b6cd23fe931d7f4158990f124491df8631d675cc17f1cfae44c92c523fbcbd
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://traffking.ru/aws?keyword=john+fogerty+i+saw+it+on+tv+lyrics+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_5fa27dcf32384.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/dalinepizukuketezoli.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/jajatevod-pifuvosused.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f888c6086c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f9e8d8409022.pdfIn PDF document text
    • https://nixewoxeb.weebly.com/uploads/1/3/4/3/134354190/24ab46b32.pdfIn PDF document text
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/6875039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa45ae64-2cea-4fcd-af7c-ed10679c4c0c/77745499050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d5f6cd-d28d-4645-a56d-12533cd79904/dragon_ml_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa1ab99-915b-452f-8e88-5ea258e9eedf/21842828324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398d35ff-906e-4089-b2ef-46c3f4ee92e3/hamilton_new_zealand_points_of_interest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04b7ead-56f3-42fb-9858-c213141e9e9f/strucid_aimbot_for_free_injectors.pdfIn PDF document text
    • https://zamilowuv.files.wordpress.com/2020/11/23096228751.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_off000070a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A3 5540 bytes
SHA-256: 83d44f97c581628cf28bcb3bb89fe7669cfc1cabc0eab410f95326d31e507d7e
font_01_sfnt_off00008371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8371 10596 bytes
SHA-256: 6571312af94d5da223ad3a6e9d687058c5b3cf2eb15d6d1767a838c192e45aa7

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