Malicious PDF — malware analysis report

Static analysis result for SHA-256 585c50efd80ec5d6…

MALICIOUS

PDF

38.3 KB Created: 2020-10-02 16:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed85fe89bbee2699f49e2fc121ce83a2 SHA-1: acb284247569c95ea8c7a21175fe717b1b280d5e SHA-256: 585c50efd80ec5d64624485511ceed1777945fbcc5a768765fc6894484dcafed
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://cctraff.ru/strik?keyword=self+discovery+worksheets In PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/sowinodevuvu.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/ruxoxumuxibur.pdfIn PDF document text
    • https://site-1037866.mozfiles.com/files/1037866/dekutolaxanabinikus.pdfIn PDF document text
    • https://site-1038431.mozfiles.com/files/1038431/13751443175.pdfIn PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/wubodevumalariredagejofo.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/44717438093.pdfIn PDF document text
    • https://site-1036981.mozfiles.com/files/1036981/gerasasunumubikatokuw.pdfIn PDF document text
    • http://files.lindastcviteachershare.com/uploads/1/3/1/8/131856188/moxafefatax_polexinavuxirod_dutib.pdfIn PDF document text
    • http://files.flourishmovement.net/uploads/1/3/0/7/130776075/e07d4ab11c4.pdfIn PDF document text
    • http://files.skye-salon.com/uploads/1/3/1/3/131384333/wuvofidibotepavapa.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/vetinesexanifowunu.pdfIn PDF document text
    • https://site-1038468.mozfiles.com/files/1038468/86135798695.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_off0000584f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584F 5320 bytes
SHA-256: ce639979c71198e64f478f7ca5987ba4171e77bcd25814c6c55f9bfa0652611f
font_01_sfnt_off00006a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 9968 bytes
SHA-256: 498f716c9166fe78edaad9a717b463f9e88e1091d9bb30e48b55ad06ec52cbb6