Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec96f0bf52527c14…

MALICIOUS

PDF

56.3 KB Created: 2020-10-18 08:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 95c630756ab1a6c12e5a50b16ca2dc79 SHA-1: de07239181d41bfea0b9548381240d9e21313676 SHA-256: ec96f0bf52527c140ab2571e3b777197faa9b917d4028ee9b8350b073c67f4b0
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=teoria+general+del+estado+hans+kelsen+pdf In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/3f7f2a4ca83a.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/45d3d5b852784.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/47f413.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/pudawewutuneno.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/zubatosibolan_zororu_vikepeb_lujuxu.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/60f3dc73.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/sezezojoroj-vijazuxopabu.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/400883.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/2345247.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/af034804addd28b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8bb45c3fdf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f89eaa57fe34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5f8bd87034a8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009a6d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009a6d.bin)
    • https://uploads.strikinglycdn.com/files/d516ea60-c5e4-459d-8dd3-c3270390d649/pubizotavef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d06812b-6de9-4e9f-81b1-c6be2e511a47/kesuwakadadazuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93363722-3d6b-4b0a-97e8-8ef4a4b7e554/2001291366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aeb56b8-2556-4a86-95db-166ea233ef39/gezebesazoraluderow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b336d6-30f1-45bb-9f42-65c770ee89b6/44295342403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0514ab6e-554d-43eb-9aa2-81de66b6aad6/47728463440.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 extracted file (font_00_sfnt_off00009a6d.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6D 5316 bytes
SHA-256: 6dd24d3615444bd8d19c583a635391ab17c58d9de7df736994feba62359fc0aa
font_01_sfnt_off0000ac79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC79 11420 bytes
SHA-256: 879c66fe445b5b4fbc453b71adba14eb3d8e3d7934229351c42fbe594fadbc7d

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