Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28e3763f15feead…

MALICIOUS

PDF

60.5 KB Created: 2020-10-08 00:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6b2e9930f8e690124739bf43b42fa85c SHA-1: bc9a020435a68a9b21caeab6438ea8ccd91ceb0d SHA-256: e28e3763f15feead938d2de48a07f08dc56008b07e7dbcf1c6489800bf85e8ad
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/pify?keyword=what+is+the+opposite+of+base+rate+neglect In PDF document text
    • http://vudawa.correctyourconcrete.com/uploads/1/3/0/7/130739094/wunenega-nibomisizima.pdfIn PDF document text
    • http://files.audiostak.com/uploads/1/3/1/3/131382239/gokikewibazi-vanupasowet-wirux-kuzumejijuk.pdfIn PDF document text
    • http://jisodud.authorbobthompson.com/uploads/1/3/1/1/131164243/gavud-wosimunezix-pugasibisogewe-budukorekukova.pdfIn PDF document text
    • http://files.vanagons.org/uploads/1/3/1/6/131606526/ralagebisutojamugare.pdfIn PDF document text
    • http://files.vistasgn.com/uploads/1/3/1/4/131483550/duxisuris-lufunume-xilokelawifeta.pdfIn PDF document text
    • http://files.spiritualgold1935.com/uploads/1/3/1/1/131164322/gazepural.pdfIn PDF document text
    • http://files.augenius.org/uploads/1/3/1/0/131070911/8c22d400c.pdfIn PDF document text
    • http://forapo.makremodelingservices.com/uploads/1/3/1/4/131452976/disizasalunal-jesuketu-jutubojivi-noluriwotaji.pdfIn PDF document text
    • http://files.diamondstatechorus.org/uploads/1/3/1/3/131398139/7074210.pdfIn PDF document text
    • https://site-1042548.mozfiles.com/files/1042548/48115570208.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/4441542413.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/63048662131.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/ripamesijafotesof.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/45cb4abb-14bd-4a8a-a641-66655a8ebd0f/latelejekoruzixez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709e5880-8471-440a-a06f-bf3be76bd4d3/8456568256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b2d19f-1702-4112-9cdd-57dce608842b/benaxubefit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b1f32f-d18a-4549-bf08-d7a89fc9e2c1/36708478749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d762ee-6fa6-4ef4-82a4-07ee97effd99/31776998815.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F30 5432 bytes
SHA-256: c4b6a306efed1fdc27b40abc3669449f40101ce9c65bac26f07082ce82f93422
font_01_sfnt_off0000a1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B3 14340 bytes
SHA-256: 205083c50c54615132de24745a0bd84602b5ea3ee192363fa2d92ec744cb83ae
font_02_sfnt_off0000cf59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF59 16060 bytes
SHA-256: 1c92c2677a7211bdb9cbf3aa97d18a342ff658e3f18f612691e6cda1cc848129