Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca0733d7f72ac03…

MALICIOUS

PDF

36.9 KB Created: 2020-10-03 20:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6c6981c5ef31f05489a5a8760c8900d4 SHA-1: e5da38c2df56bd8288933fcbbccb414096fdc893 SHA-256: 6ca0733d7f72ac03c0e31d555bdc92a2860e8e79703f2ee7d7340dd54bbf75a6
194 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.
  • 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://cctraff.ru/strik?keyword=jully+oliveira+pocahontas+altura In PDF document text
    • http://files.dominicbercier.com/uploads/1/3/1/4/131437932/014a6d.pdfIn PDF document text
    • http://xebebifag.hockeyaustralia.net/uploads/1/3/0/7/130775797/rivakipezatifesolu.pdfIn PDF document text
    • http://tukamidox.icompassmedia.com/uploads/1/3/1/4/131437535/4790795.pdfIn PDF document text
    • http://xubereb.gregstarnesauthor.com/uploads/1/3/0/7/130775934/xonejon_zuwifivumimo.pdfIn PDF document text
    • http://files.taraflyart.com/uploads/1/3/2/6/132695372/pelasur.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/26435157725.pdfIn PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/41379992287.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/1/0433/9063/2101/files/74460249401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0715/8690/files/70394554055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/40905557600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7579/5099/files/dabawadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f59fb8-9d31-42cb-aee6-f9a48992b5c2/57854165736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60807ad4-52b6-437a-ae7d-580be3047ea0/pomirugotemovadedajes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5643b8f-0255-4415-840c-f5bbbbfe4199/xofuvudasufakowubuxedetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8113940b-4580-4b0c-9ae5-48c2cfe24ed6/13879299100.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_off00005330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5330 5172 bytes
SHA-256: 426ce12c935a0d808bb65c440b7687ef925ad2465a36f5acf3feaf8d65fbc50a
font_01_sfnt_off000064cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 9980 bytes
SHA-256: 4eb2bfa796c7be5b76ac1c717b2af2f423861e9ba98945eee4c523b2f420a341

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