Malicious PDF — malware analysis report

Static analysis result for SHA-256 799e81cf3272b197…

MALICIOUS

PDF

42.0 KB Created: 2020-09-30 01:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3994e2e924b59800ecd6bbbd9695f157 SHA-1: 2ab88c0d3049461001fb6c30fdc056eb2b65d799 SHA-256: 799e81cf3272b197797374f06918fccae47f7a495f121a4870d05a84b4d3919f
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ggtraff.ru/strik?keyword=amazon+brand+guidelines+pdf In PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/nivikimerajopureruxav.pdfIn PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/10431836985.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/sipuguzamiretosepeged.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/guguvununezuzinapetalelud.pdfIn PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/39284853022.pdfIn PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/26248249501.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/bulatifu.pdfIn PDF document text
    • http://dometuz.magnolia-gypsy.com/uploads/1/3/0/8/130873946/jukaxaxisunakuk.pdfIn PDF document text
    • http://nutuju.kudubijou.com/uploads/1/3/0/7/130775823/kelumakapag.pdfIn PDF document text
    • http://lukibox.coachlesley.com/uploads/1/3/1/4/131406893/dfd1e.pdfIn PDF document text
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000655b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655B 5540 bytes
SHA-256: 997b8945bc5b9a65bb6cd82b9adc6b3fd64adc5881c78b4be5fcb146e5af5ade
font_01_sfnt_off0000781a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10288 bytes
SHA-256: 18dd7523c0e56feb621747f562a1d6c381a15ff256b458e377d61680483e3494