Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8b77ee9f540082…

MALICIOUS

PDF

56.5 KB Created: 2020-10-11 05:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: be843510ae9f057846a9ca36a878401e SHA-1: d14cc52fbf82debdb15ce83de2704ce9668ca66f SHA-256: 3c8b77ee9f54008296e37373f5747dd8b2df78977e5848c5dec0a0b7baf66b25
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://gettraff.ru/strik?keyword=cart%25C3%25A3o+de+cr%25C3%25A9dito+gerador+com+dinhei In PDF document text
    • http://gopudil.kaufmancountylawyer.com/uploads/1/3/0/8/130814297/noboj_komoseriz_lokusudebagej.pdfIn PDF document text
    • http://nukiru.edutuneswithmissjenny.com/uploads/1/3/0/9/130969449/saxafu_zuvafasiku_nitawezopojimip.pdfIn PDF document text
    • http://files.trackingclubofma.com/uploads/1/3/2/3/132303340/a16b5bac.pdfIn PDF document text
    • http://files.wicomicoriver.org/uploads/1/3/0/7/130738614/rarijitubu.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/e828aa18-3f33-46dd-b367-fb4b607e60c7/50909769494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41b75d2-9232-4dea-951f-eec3e9a2b21e/85622347964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af294e59-1180-43d8-82bf-f59da0775e04/bivixazajatusorififipaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93ff4d3-afe5-4c4c-8f08-8baf875f0fbf/8258828035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e88395e8-fa4c-44cf-a888-90984f6f37d2/46086223133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397360ec-d985-4750-9301-cdcf3948c168/59075906715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5621f8-c674-45d9-bd9b-e4a4ba0c2192/3473206803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b9215a-8660-4db7-b4da-437d0240553a/leradagijuwududuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9249ef3c-f87e-441f-ad99-1a61c006b5bb/napigapoxurasetuxoxaguku.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 5508 bytes
SHA-256: bdbf1e66f5acefe54bdb6d9f20266f02e41381bfb7bd2b6b482386f939827583
font_01_sfnt_off000094f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F1 13360 bytes
SHA-256: 7fd5ec972cce279add64ec8593d03ec71f21349ceb77be8e08082483c818039b
font_02_sfnt_off0000bd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5D 16164 bytes
SHA-256: 201044b806add57bd25b43d6e3b5c05de4f9d5f5a1bc981858fd438a93e762f6

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