Malicious PDF — malware analysis report

Static analysis result for SHA-256 4945612d875d6b23…

MALICIOUS

PDF

67.5 KB Created: 2020-10-15 15:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 13f1a17e9d810e0ef950c8e5358a2e83 SHA-1: e6024db23a32a2829d0068c104195e9510c211aa SHA-256: 4945612d875d6b238f5dd62c8eb70cc2ceff9d9ad5f1aeff919e0f773c3f076a
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=fifa+world+cup+2020+teams+squad+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f881911879fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86f42213348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f881b5dd6d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f873dd064682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8756ed63581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f880752db521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f87205f65bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f87214754c45.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/neninug.pdfIn PDF document text
    • https://site-1043690.mozfiles.com/files/1043690/xexodagenedugidegodi.pdfIn PDF document text
    • https://site-1041682.mozfiles.com/files/1041682/57307914758.pdfIn PDF document text
    • https://site-1038777.mozfiles.com/files/1038777/kuwejiditig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f87b11f681c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f874dc337059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8829c3721e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f87c02c7a90c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f8805c3e19dd.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/23d5bb3c18ef.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/bubutowunaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0757/3653/files/gw2_triple_trouble_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7675/6669/files/bimapukepawedefezunejix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4188/8158/files/baruzevuduwoguvulixi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000e0b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE0B6 18584 bytes
SHA-256: a66aab1456b927fa4fe120f71175cd512144e12193eaaadc2dde3d0e82f1d6c4
font_00_sfnt_off0000a95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95B 5748 bytes
SHA-256: 78f8d3577faba560f69bfd86cd4fa26d5a7d49c05574d7e476a323bbc511516f
font_01_sfnt_off0000bcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDD 10468 bytes
SHA-256: fdaae4d137941a158f07db6caa7d6bdbec77a4e40c80189f00788b06a51bae7c