Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aaccef0d074a807…

MALICIOUS

PDF

39.6 KB Created: 2020-10-02 08:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b68a57bc6aef867e187ff831cac73308 SHA-1: 2c91cdaa64e29769c6cbbc4108102dddaa32b7b2 SHA-256: 8aaccef0d074a8079bf4966154a9bd943d2fa707c60c9da39637ef62d8aca984
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=jackson+fire+department+pa In PDF document text
    • https://site-1037885.mozfiles.com/files/1037885/86062550001.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/19693480799.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/fibev.pdfIn PDF document text
    • https://site-1038715.mozfiles.com/files/1038715/62014980745.pdfIn PDF document text
    • http://files.hananhafiz.com/uploads/1/3/0/7/130775378/xesogujokowokitade.pdfIn PDF document text
    • http://files.expressionsdanceplymouth.com/uploads/1/3/0/7/130739684/wixonibo.pdfIn PDF document text
    • http://xarilur.elephantmomma.com/uploads/1/3/1/1/131164424/3090150.pdfIn PDF document text
    • http://delub.webofloneliness.com/uploads/1/3/2/7/132712596/womimifir.pdfIn PDF document text
    • http://files.yusofgajahlingard.com/uploads/1/3/2/6/132695732/nipukifali.pdfIn PDF document text
    • http://files.osacps.org/uploads/1/3/1/4/131407655/xoruro.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/85277d48-3bf0-4dee-a77f-a35f0375a067/firofexolasovuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b3547e-315f-433e-a022-f3aaf7f3a1c3/refopinabirokuruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f172a1c-166e-45e4-bd81-613b01694921/46632807964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19efe37-3065-421a-933f-9e7f2e23a212/vurapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a83c53b-92bc-457c-bc77-2435c920acc4/15469124142.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_off00005bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 5320 bytes
SHA-256: f9e42e25d4eb2ccd2ea339c8b498bff882b17c653d50e721124e978e65b1b134
font_01_sfnt_off00006dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 10540 bytes
SHA-256: cf6272d3de79797f81d263e26434dd17a7a208d82f41cdcf942149f851cdebfa

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