Malicious PDF — malware analysis report

Static analysis result for SHA-256 0377d695adbde038…

MALICIOUS

PDF

43.7 KB Created: 2020-10-22 21:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c0307d17748cfdfab923d81feb412169 SHA-1: f847ba4a9200f866cf620e9ba1b791b24d63fbcc SHA-256: 0377d695adbde038abc5cc4dbe1194e21fb0120cf4326897a5b17c2739d6b726
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/aws?keyword=azimute+e+rumo+pdf In PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/vagaritisimuwubono.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zerejitofotug-dugejamin-dudim-ninizupewu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/3679097.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/laguxek_pugefewemil.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/8909761.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/7878155.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/9550092.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/fa949aa4840.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/1/0486/4422/7230/files/fivedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/infinite_jest_readers_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5262/8629/files/86337371806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9501/5831/files/zonuwef.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/xunarebuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/jexatowutuwizumikozake.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/suzufisufa.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_off000051a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A9 4808 bytes
SHA-256: 8cc6a9504aed178ceaa70c552adcebd680e72905cb05033daab5b4dca1a5198a
font_01_sfnt_off000061f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 13132 bytes
SHA-256: 0e4e72e67ae396d5012c32b9f9e99a8f60689f0758ccf10292b1b39af799f680
font_02_sfnt_off000089e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E8 16568 bytes
SHA-256: de19f3a0f182f168fb4d74c02f0687521503a3d773db96f229afdf122ccd944d

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