Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d2b6f487130212…

MALICIOUS

PDF

38.2 KB Created: 2020-10-30 20:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6419b9b1569ee4edf1b333b74d4b60fd SHA-1: 8edbac3076762e16ac8b3fc8887ef87d1990b3b1 SHA-256: c0d2b6f4871302124f2a91dd21a1b7053c31a72de5b21dc98c06b6914cade9f3
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=3+veces+tu+libro+pdf+completo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f8e051b6adf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_5f96046eb53f7.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/wazivametatij-birexomovev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8843879c3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f9077d0662e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5f8c921aa6aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f98ffb3d9651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f984affea635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f925f1f29f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f9968e1cb93b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000053de.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000053de.bin)
    • https://cdn.shopify.com/s/files/1/0501/7347/7040/files/dd_5e_handbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9638/9828/files/32559358753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/nespresso_coffee_machine_instruction_manual.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 extracted file (font_00_sfnt_off000053de.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DE 5360 bytes
SHA-256: 1fd3e274608dbb6d15ff028d21f5aef4e95473113fd93da4846549dd1fd1d00d
font_01_sfnt_off00006603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 11832 bytes
SHA-256: e01767665d9659226174b0824a2045508509801ad05d58fc0d7376c6745bb3e7