Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b53933567a2c1c…

MALICIOUS

PDF

38.3 KB Created: 2020-10-07 19:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f2c8171cf9b8f049a27fdf40c0e70cd2 SHA-1: 2963a765eea22b700f64161465d831b507f8d536 SHA-256: c5b53933567a2c1c077f532247cf42df2b5d299bad3ef18b9cd288d30fd8bfc0
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://ggtraff.ru/strik?keyword=the+only+astrology+book+you%2527ll+ever+need+pdf In PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/vukabirimuwux.pdfIn PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/gitivodulewodinejene.pdfIn PDF document text
    • https://site-1043571.mozfiles.com/files/1043571/52866964315.pdfIn PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/93179960080.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/25500564209.pdfIn PDF document text
    • https://site-1038508.mozfiles.com/files/1038508/40756818889.pdfIn PDF document text
    • https://site-1043296.mozfiles.com/files/1043296/67830399512.pdfIn PDF document text
    • http://kefewojik.kennypughmusic.com/uploads/1/3/0/7/130776760/butimilekuzoxe-mosamozaf-jinuxurati-zobonev.pdfIn PDF document text
    • http://files.maplegroveumciowa.com/uploads/1/3/1/3/131379042/jifegezuzujezaze.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/a53c3301-f39e-42d7-92f4-cbdfedfbe3fa/dezuxelinukimabetepikuses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc00365-8561-473e-93f7-1348fce99362/rapelegavimomora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b43919-ca7c-426c-ae10-fd9355e08093/62730651381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c829ce-a0f9-46bf-bc9e-112e405ed9b7/xaxagojanida.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_off000055fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FA 5652 bytes
SHA-256: bd370b1483e5dece94f828c87c40862289a23d401635f361b4938238b1cc2dea
font_01_sfnt_off00006945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6945 10412 bytes
SHA-256: 7dd8ae06cbab95ac1487f05b8ebd00d99f5b19298f2f9a6270b8312282faf092