Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b682e02cf4ae2e1…

MALICIOUS

PDF

44.4 KB Created: 2020-10-16 09:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ba0e0308c8c8ae7ce552353901522fb3 SHA-1: 80dd7385c07af046b5b6689c5b80aa8a8cfcd5b1 SHA-256: 4b682e02cf4ae2e11576705834d442871cce8346edbc6f0903693bcc2304e81e
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://ggtraff.ru/123?keyword=android+9+gesture+control In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8920cadbd97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f892a68b9986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f871bd46148e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f87e5dfb450f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f870c4fd4c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f86f86048e8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f88fcfcae817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8837dee9732.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/2ab8990a-d44e-4a8d-9353-d7386f3940c5/bugigepuvukeniluki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868569ff-f6db-4c6d-b64f-b82f61efdccc/16294700046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c6f43b-ced0-43b8-a19f-1cf8d6fc6ef4/63159872092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71395b16-1dfb-44df-a49a-b34701073ec0/72372633226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3c740a-fa0e-4cde-bf2d-f55efd255529/84636969203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d615a3d-845e-44cb-ba43-a590e15f3049/jukikizujeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196d3e65-ed34-4d2c-b8a5-349a15846f47/68076175001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967849ae-6cdd-4e2d-ad56-8349480a3480/wevikexumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3159bff1-a68f-4292-93a6-c6ed127ae1bd/notituzokebosoxofeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7428/7269/files/marvel_contest_of_champions_mod_apk_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1135/4005/files/da_form_4179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d0c9be-a80d-45e9-bcae-c4a9a113ee08/renidokunaselon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6e2406-1f5a-4830-9e8e-b1b13cc8d87d/53754627873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2095798-a1f1-4fe5-a8c8-035dbcf37c1a/55668176007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97b443d-e0e8-4757-b712-895dc1fe0a1e/21233596895.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_off00007065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7065 5040 bytes
SHA-256: d02b40569c8eb4dc1be31d1cba08a62f5aada3d1c71de0964eeda2d2a95d2133
font_01_sfnt_off00008198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 10020 bytes
SHA-256: 398b507d257d44c30c55cd81d5dd906c249c999ce75faa27398a0dd8b28dd6c0