Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd762f5b4f9b505…

MALICIOUS

PDF

39.6 KB Created: 2020-09-30 00:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6e01a10c2204f18aba47e4a34e18e9c8 SHA-1: b228bd90cf31a2474d52f72e0894882d5280b928 SHA-256: dbd762f5b4f9b505b830aba27a19c2af1b7d75a06c9d295e8e089bf3df5b6a70
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://ggtraff.ru/strik?keyword=pdf+to+word+converter+arabic+text In PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/48021960970.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/47518348658.pdfIn PDF document text
    • http://tojajixep.sacredkinship.com/uploads/1/3/1/0/131070374/xamomeferuzasemader.pdfIn PDF document text
    • http://files.nazmassage.com/uploads/1/3/2/6/132681307/jexukuxadekabivikipe.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/54521883-8a76-4a61-9d94-dbcaf804c774/34961547405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3a6e56-56fa-4c1a-bd5c-addacc524124/726357677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02534d59-6496-4cbf-a3c2-a161a6002e44/rijapifuwamisedimod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377f2740-fc8d-4afa-92d2-e5e74b28d30e/56687371470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/honors_biology_unit_5_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/aisc_steel_construction_manual.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_off00005d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D49 5164 bytes
SHA-256: b730508ae96e7a2e613ed987114432a20a2f2a579daad851f6f60170e745f093
font_01_sfnt_off00006f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 10172 bytes
SHA-256: 8b1e344b938206bcbbe1bdea6dbad8bb99ddf8efa31f9b0e4119c8abbec66b27