Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0b78df7d55787c…

MALICIOUS

PDF

46.8 KB Created: 2020-10-11 15:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fde11620b277941ae0fc9b295c962cbe SHA-1: 0f965c1fc91045b973bf969a53db476fc4bbddeb SHA-256: ae0b78df7d55787c0afcd6c7699a9ca1a9af92bfd881ce635fc3ab84faf0aba8
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://gettraff.ru/pify?keyword=hinduism+social+impact In PDF document text
    • http://duwow.kylewhiz.com/uploads/1/3/2/6/132683085/2af057.pdfIn PDF document text
    • http://mufoke.hurrenaestheticsatwork.com/uploads/1/3/0/7/130738841/kowagojewo-jogerafulo-dumutuva.pdfIn PDF document text
    • http://toxapufaj.chhs-piratecountry.com/uploads/1/3/2/8/132815015/nedezixazobida_vagivetepawurel.pdfIn PDF document text
    • http://zenonu.donnahoustonafca.com/uploads/1/3/1/4/131482812/gokum-muxotosag-nanewov.pdfIn PDF document text
    • http://desev.capitalstringing.com/uploads/1/3/2/6/132682787/josanuwaziduvinub.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/3ac0e3b8-5f30-4341-a6ab-398c33a83bfa/16224726709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766644f1-553a-45b7-a72d-5ced791fbd21/34491649134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de809e0-d9a5-4415-8c88-0c8f49f20b83/76265862296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477c26c1-b750-45f4-9361-885ecb4949c6/nofofukijeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8fbfa6-7441-4928-a8ac-badef573fcca/54032789095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c96745-2f20-4bc6-a370-02e974f60f4a/79512897057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41dd52b-9d6b-49df-9e31-4197afd64440/pibigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9e63ab-1806-48c6-b6f3-edf497833977/28990697724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e7d52c-2ff4-4f7b-a920-d9921fc36f96/xerasexum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae703ae-cf8f-4475-89f4-5fa7c33c80ea/murotinuzegativudo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 5084 bytes
SHA-256: d3d6d62ccd54b8ecc29ee13434b4966379965d66d22320ed95d5b9815a2b209c
font_01_sfnt_off000074f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 9780 bytes
SHA-256: 2cd634c56fd013b4f60730aca153f9d23eb6db0c79c019f0bd2979a36e67af6c
font_02_sfnt_off000096a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A0 16836 bytes
SHA-256: b190bb2a08d8b0cf464e16ec20c6b26a5b6a61a9187c672dde3042b94f324eb0

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