Malicious PDF — malware analysis report

Static analysis result for SHA-256 8235d4ac767c411b…

MALICIOUS

PDF

48.3 KB Created: 2020-10-21 12:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: 7b5f399955abb7fde1d8cf7466a1295f SHA-1: ca6e8ec151918af11796d750c67cdf1780a0d756 SHA-256: 8235d4ac767c411bbc03fe325d0164623599bd6092027824580792883360814d
184 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.
  • 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://ttraff.club/123?keyword=tubemate+3+for+android+app+download In PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/mufodexij-bepafakinagusel-subutaritatuj-diwubozora.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/ginovunijodaziz-lutipujejoza-devupiku-jodizumuxux.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/2006625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f8f525951b07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8a23ece2652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5f8e0dab76b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f89b312d03a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f8d13d08d4e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f8d6d57c2b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8f48171ba6f.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/cff39355a.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/ludozewowonufalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007d3c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007d3c.bin)
    • https://s3.amazonaws.com/xanebavifamopez/xivawaxoxililasajeb.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/99311030530.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/fosomikogebilezotuzet.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/82379764336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3178/8182/files/kedarnath_movie_song_mp3_wapking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3165/7130/files/esge_capsule_endoscopy_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1185/6322/files/ninja_1500_food_processor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6617/7691/files/takipenedupoz.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_off00007d3c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3C 5356 bytes
SHA-256: 07a70a7fcd957d8e45b01e8647cfaf886bdc780e88b29ffb8cacc8f457424984
font_01_sfnt_off00008f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F65 10668 bytes
SHA-256: eb33592395775d01ccc872a62baa9229e3abae36a58a5b573c6b007d201a5303