Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03ce3f33eaaf711…

MALICIOUS

PDF

36.6 KB Created: 2020-10-31 03:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 3d21a8c78b11ad619fdb6d041e85e9d3 SHA-1: c3eba9698a34fbbd92bc4669c4ca7ba075f4b794 SHA-256: e03ce3f33eaaf7115ab4a0dd2b67608a38a908dc90c9096e41621fc3594fa56b
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=chat+n+chew+turbeville+sc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420434/normal_5f98660f51fdc.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/zirojopemup/11th_bio_zoology_practical_book.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/54533587968.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/foothill_middle_school_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3904877e-510a-4ea4-ab80-ec5350aad827/concise_history_of_western_music_5th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef744a3d-d8f2-48a7-875a-00ba58bf5dd3/66367781570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7140/4707/files/wings_of_fire_book_4_graphic_novel_read_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7565/6097/files/michael_nielsen_deep_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/11779088850.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_off000050d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D7 5084 bytes
SHA-256: da67628df3be4a318d4378911067d88774344e7cea0445ee20060ad6a5e2ca26
font_01_sfnt_off00006230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 10476 bytes
SHA-256: e339922f7db3c2e9b0430dd0fee5c823004d982736470279bc4441f97d8be194