Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb4ab83def45afe…

MALICIOUS

PDF

39.9 KB Created: 2020-11-01 18:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 97ee6d6a7fb2d1e39f2ce0bf43404f3b SHA-1: 3dbd539286e471b6ab6ab22e8b9bc0922df0610e SHA-256: ebb4ab83def45afed95745c0e12c6da13feb34590bd4bb8690eed6d947c7fdb8
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/aws?keyword=scotts+standard+broadcast+spreader+manual In PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/zenudi_muvagubanetive.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/7146550.pdfIn PDF document text
    • https://xomipuladijig.weebly.com/uploads/1/3/4/4/134401164/afc5f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f92269bf1e7c.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/mopudu-soxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_5f987d2d81b10.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/1/0501/8337/2952/files/35966637770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50e01bc-8e97-4d7e-be37-61fe5f4cbb1f/tojikodug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6815/9683/files/catalogo_telemecanique_2018.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_off00004c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C81 3808 bytes
SHA-256: 64d76de71033b9341a0cbf5268d87b4bfd76cacab723d18407ca1153c8ef3412
font_01_sfnt_off00005a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3D 5460 bytes
SHA-256: 57292efe5acd7a6110ca05b10de200e97006f7cf2b5a1cd036abab7fdcb9db5c
font_02_sfnt_off00006cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 11148 bytes
SHA-256: 99ec5289e4f1b191407fca8ead970fbece2a033b0950a2b6114602bc3c46c477