Malicious PDF — malware analysis report

Static analysis result for SHA-256 69744cb4f8f48bc0…

MALICIOUS

PDF

46.9 KB Created: 2020-10-05 13:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 18303951971d7579344544cd2d8df776 SHA-1: 1951271b9fce88e856d81b884a0e556bf21b9985 SHA-256: 69744cb4f8f48bc01d9ca6b8cd9015985dbc1df81d2fc639ac2ec9da55c74923
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://cctraff.ru/strik?keyword=o+que+%25C3%25A9+hernia+de+hiato+esofagico+grau+1 In PDF document text
    • http://files.rachelyuengaetz.com/uploads/1/3/1/3/131398477/tulewomovugiwunagaze.pdfIn PDF document text
    • http://vulilipo.tlc-tree.com/uploads/1/3/0/7/130775200/japijakiturewa.pdfIn PDF document text
    • http://files.countryflairbandb.com/uploads/1/3/0/7/130776875/xuzivawuduvokog.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/75254815865.pdfIn PDF document text
    • https://site-1042869.mozfiles.com/files/1042869/rimalafukepuvide.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/bubigexitaxap.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/ponozuxunadivifafotaz.pdfIn PDF document text
    • https://site-1042785.mozfiles.com/files/1042785/35315678258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7db274-bb66-4864-8477-f4b7bfbd9c4b/22042048825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd10b4ab-873a-4d28-accf-38363b56f2b8/petedazatikiwemegixemaguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d99cc7-424c-427e-8ae3-d65282e93fda/70909602128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c71945-d83f-421c-8dba-41d4595075cb/gewulepesevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63c1dd4-78f6-411b-bdc6-ad8d8a4faba9/tuvaxofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de42855-f2f8-40c6-97df-751a5c0b0502/vovapit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390c28ed-3164-4bf3-9b94-a3bb99f6d5bd/80584635727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed45c1f-dd87-4988-87e5-f35a09e1c2ae/birerafi.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_off000072ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 5596 bytes
SHA-256: 323d63d46620023701e6b63cfa121b1b0aea7c3372cbd6b2aae005d0ed43f491
font_01_sfnt_off000085bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BC 12688 bytes
SHA-256: 7908e477435e273b60390cd6e781d6069d5d21c8cb57c2771a27076f3b3c1961

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