Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8239b5f5d54722…

MALICIOUS

PDF

42.1 KB Created: 2020-11-03 13:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9c2663ffa24089e5f3b66775b75cff43 SHA-1: 5ad044a50c0f4e4ad87674be11ce88840a7d19f1 SHA-256: ca8239b5f5d54722f4479035652c4ecbb5a4547246674a1853dc14fa116340cc
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=kodak+easyshare+z5010+camera In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_5f9ce07d22023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fa086ed9320f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f8e53b4db3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f9f7a282b1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f9f8af578639.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/zezugirim.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/hikvision_ip_camera_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/66368002587.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/33736363751.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/que_son_las_redes_troficas.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/chrome_open_blank_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7c6c53-2f64-4493-a7f1-9d4c913c9086/patupexaguwabim.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_off000062fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 5648 bytes
SHA-256: 6c4e48f80cf94d84c787e267abdaa08ab4539be97c79caec7bdc1d94e8ec6edc
font_01_sfnt_off00007628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7628 11148 bytes
SHA-256: 27b1f01e39fab65f305efc8203dc9e262568a4b08467a106baf581f61ed26163