Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a38e0370286d36…

MALICIOUS

PDF

52.8 KB Created: 2020-10-05 07:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c8db1f82a67cc6019dd3a6fa93e9d5aa SHA-1: ea583bdd2a25313071d11b88ff406bec69105ac4 SHA-256: e4a38e0370286d36877c3be1d61bbc86409748f95fe58356d7d556bf8d3bc1f5
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://gettraff.ru/pify?keyword=robert+murray+mccheyne+biography+pdf In PDF document text
    • http://files.mauiphilbaptist.org/uploads/1/3/1/4/131406892/8c5f885ee9f91.pdfIn PDF document text
    • http://files.calas-ct.org/uploads/1/3/0/8/130874058/9543006.pdfIn PDF document text
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdfIn PDF document text
    • http://tewadig.madtownrent.com/uploads/1/3/1/8/131871979/5402658.pdfIn PDF document text
    • http://gufojeke.americanbeautyesthetics.com/uploads/1/3/2/7/132712415/xepevibidaja.pdfIn PDF document text
    • https://site-1040982.mozfiles.com/files/1040982/xaxenimirafarori.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/dedukokefegobubikuvabokin.pdfIn PDF document text
    • https://site-1043764.mozfiles.com/files/1043764/61350693707.pdfIn PDF document text
    • https://site-1038565.mozfiles.com/files/1038565/54351421025.pdfIn PDF document text
    • https://site-1038590.mozfiles.com/files/1038590/13835265910.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/91135586342.pdfIn PDF document text
    • https://site-1037268.mozfiles.com/files/1037268/25960596869.pdfIn PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/37388190995.pdfIn PDF document text
    • https://site-1039435.mozfiles.com/files/1039435/xovesitibogobokugomomudus.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/ef7c50a4-8bc4-4084-8a62-0b89fb7b0103/niwikebitajemeguxewupumiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5317de72-6008-4f29-a091-44ec61b77279/53272263930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e316ba26-ab70-42c5-bd65-5748e306812e/dawixutuvovidapuxidugena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1354b3-fae1-454c-810f-c4a800b5eba9/rusikamunipukabananijakuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2646e05e-d612-4061-a284-9bb47aec74e4/62291260328.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_off00008f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 5608 bytes
SHA-256: 7cab3b597f65777f09be1dde4e81af600eab107f56fe80c7916e72424d9807e3
font_01_sfnt_off0000a25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA25D 10288 bytes
SHA-256: f936922fdb0b396c91356a927ca07a18d17236c4b9a28d307fd9f2d6bb6688d8

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