Malicious PDF — malware analysis report

Static analysis result for SHA-256 5635a6691f5900e6…

MALICIOUS

PDF

44.6 KB Created: 2020-11-06 04:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 0ad867a260d82e176c92577256cd2218 SHA-1: 37fca0ea99a1cbfd53b8b67c8561d026d6299c57 SHA-256: 5635a6691f5900e62d66dcc5fb8e98292dfa2599450b83bccd3d076e23d775aa
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://traffking.ru/123?keyword=anime+4+you+naruto+shippuden In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f90d2f4524e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_5f9673b0afbc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5f9c6d0ef0866.pdfIn PDF document text
    • https://dawanuma.weebly.com/uploads/1/3/4/3/134305997/169382.pdfIn PDF document text
    • https://korumarivaz.weebly.com/uploads/1/3/4/5/134506991/lobozozokuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5f8d45bc7a467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f9849984fa6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f8a6255d233c.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/zuxime/62417494100.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/99212866011.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/word_that_start_with_s_and_ends_with_r.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/candlestick_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/questes_de_meio_ambiente.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/umn_spring_break_2020.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_off00006ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DED 5344 bytes
SHA-256: 82e285e82c952221c5f2cf48d61cd1c1d2cde90fed76266fe8e98a876aba6e43
font_01_sfnt_off00007ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF9 11644 bytes
SHA-256: 28b01eaa277c1d010f5121fac75dedadbb1fb1d3a8e3583b0e51c80783ba476b