Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f0c6539e01840d…

MALICIOUS

PDF

36.3 KB Created: 2020-10-02 15:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e372c21dc752f03e1aa403385a529bea SHA-1: 232e18b1ad42e9f9978c84d2c1df4197bf1d8091 SHA-256: a6f0c6539e01840d8134a184f75939635076e7e21f4887bdbf020e83de1a3e1f
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://ggtraff.ru/strik?keyword=ciencia+de+los+materiales+askeland In PDF document text
    • https://site-1036930.mozfiles.com/files/1036930/mepixutekije.pdfIn PDF document text
    • https://site-1039375.mozfiles.com/files/1039375/22008795935.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/kojeji.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/xexewerumil.pdfIn PDF document text
    • https://site-1037899.mozfiles.com/files/1037899/vopawejop.pdfIn PDF document text
    • http://nejudej.charmchi.co/uploads/1/3/0/7/130740189/8c85d141f.pdfIn PDF document text
    • http://nejixowej.purvine.org/uploads/1/3/1/3/131398097/mowijo_xadoli_fujagelid_zimigugi.pdfIn PDF document text
    • http://files.binghamtonrooted.org/uploads/1/3/0/7/130774968/xiwexuxid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5736/0279/files/zijenaviko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/raliwano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5525/5204/files/vibawavadexotizudafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/english_for_lawyers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c68c966-422d-4b93-9fd4-24ff0016b3b7/29879749276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5780466c-634c-461d-ae39-54e0edc093b4/wapobaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1490686a-5cce-4317-8e99-d93ddb74472d/kijulusukesojosigal.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_off00004ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED4 5052 bytes
SHA-256: 6839996432b1d61b5abee2d15588cbadd648f17cc2463216d8622081e391746f
font_01_sfnt_off00005fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 10836 bytes
SHA-256: 872895f3acc628eaaac895474591118a83a39fbb36989cb8db101308b2c46857

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