Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ca9bc5998ffc90…

MALICIOUS

PDF

55.6 KB Created: 2020-09-30 09:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4663f9c0bb88b9dd92d5707310d3f725 SHA-1: 4d270f08fc2d251b35794bbcde653bf8c8a0bc1f SHA-256: c9ca9bc5998ffc90cfbe7c1f0fbefebc2ca5e69a4a5e1455bef4a9a937de59e6
134 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=birads+2013+espa%25C3%25B1ol+pdf In PDF document text
    • http://files.buymyoldvehicle-peterborough.co.uk/uploads/1/3/2/3/132303219/922248.pdfIn PDF document text
    • http://files.cblhconference.com/uploads/1/3/0/7/130740530/putolusuzixiker.pdfIn PDF document text
    • https://site-1037088.mozfiles.com/files/1037088/divijifilep.pdfIn PDF document text
    • https://site-1038529.mozfiles.com/files/1038529/86102717923.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/pipur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/wiwawiwavagorijijeputudap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5330/1150/files/gepuvubidevoweruluxisode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/bollywood_film_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b30109b-1a64-4d7f-aecb-8460a78edec9/tifutukusenasit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ba7d22-ea8d-4293-bf31-5232c3f8dad9/mezoxezaxisesinot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fda6613-3a76-4c80-9a08-0ce01464974b/venozululewujisigagekupat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0eccef-0dbc-4693-b730-3b890aca7c98/vopiwuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 5388 bytes
SHA-256: 883a31bcad2666a5818fe063cacfad69c6de78abd641a412fc64e6b46111ace5
font_01_sfnt_off00009e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E41 10408 bytes
SHA-256: 40792a19a83361f6d55928a609cebb7f618c548ccc4635442901c3e5b5daddd8
font_02_sfnt_off0000c1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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