Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b57d3a60e54c009…

MALICIOUS

PDF

42.4 KB Created: 2020-10-09 12:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b503a698722c3f3bbed69eec0c3eb1ca SHA-1: e3f5ca479fcfb6862f46185752a09ff923c95876 SHA-256: 0b57d3a60e54c009b0613c19ff3bb2669a963fad644618bf9efc193f0f037387
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=wahl+5+star+shaver+for+bald+head In PDF document text
    • http://dakolujun.felcbillings.org/uploads/1/3/1/8/131871740/7800554.pdfIn PDF document text
    • http://files.laneinspections.com/uploads/1/3/0/7/130776592/1315519.pdfIn PDF document text
    • http://files.champagneandhotdogs.com/uploads/1/3/0/7/130775868/2683515.pdfIn PDF document text
    • http://bedusejo.countrystylebbqcatering.com/uploads/1/3/1/1/131163898/8061640.pdfIn PDF document text
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdfIn PDF document text
    • https://site-1040427.mozfiles.com/files/1040427/1777275046.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/51055354248.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/33120851396.pdfIn PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/20141290125.pdfIn PDF document text
    • https://site-1040567.mozfiles.com/files/1040567/54295537972.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/65a8a0e0-e496-4be2-8348-d7a9f5bf0c03/64726264129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64c14cf-3461-497d-93af-b6a39293f6aa/nodozokerukudigulodofusan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24db8da5-30f9-40c4-a8bd-c2d391400b00/99485456166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf937875-927d-4992-8455-ca73387429c7/78115673290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ec8b0a-1db9-46d8-b2f0-01473efc99cd/wetojodufiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35257538-776c-4db8-affb-0d06d63609cd/3498348089.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_off00006656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 5332 bytes
SHA-256: 7253af6d7fa8e34184346543611e241afe9ccfda40b8f2e5932cae2179a06c13
font_01_sfnt_off00007886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 10632 bytes
SHA-256: d583a409333c7cf2fbcb63f73828b6b72af40fff7f75775c58710734ccd07f61

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