Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80fdffb75617a9c…

MALICIOUS

PDF

50.2 KB Created: 2020-10-25 06:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 681dd468506eec55a43e68c83b01678b SHA-1: e06f3aaf7721ae55282d82a5e0507a8881aaa799 SHA-256: e80fdffb75617a9c98b20825b3c0fbe79a6d287e5de0e397339a112a1a79075b
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=add+pdf+to+kindle+cloud+reader In PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/d0a9d080c71.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/bac6b15f061a8b.pdfIn PDF document text
    • https://pexazunawilaga.weebly.com/uploads/1/3/4/2/134265520/luvokoxoj.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/dudefireditit.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/fimidakizesatu.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8fffa7d8229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8739bb69047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5f92aa4bd29c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f8a952dab179.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000772c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000772c.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000ad99.bin)
    • https://s3.amazonaws.com/rizijubovapuk/nugogis.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vowufe.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/kanoodle_game_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/29268157627.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/counting_worksheets_1-_100.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/temajifewuru.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/angiology_book.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/jovurawepesawumek.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_off0000772c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000772c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 4904 bytes
SHA-256: 24c69cefbf095d9bae55c6d2fc14aa14f66fb162d1468d584a1067919b37e9ba
font_01_sfnt_off000087e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E6 11052 bytes
SHA-256: fad74b813b726675be12b99d4e1fbd8132e477fe70e137fbbe5ba3f9f94ed5e1
font_02_sfnt_off0000ad99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD99 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378