Malicious PDF — malware analysis report

Static analysis result for SHA-256 9073cc4874558b95…

MALICIOUS

PDF

33.5 KB Created: 2020-10-07 11:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 337e7cfeb977d052cc1fb5549e472144 SHA-1: a6d2ac8485d29391ad2e62197ab62f29ce79b909 SHA-256: 9073cc4874558b952ccfec30393dff6ecdffcf39599bfc28f85b98830698b333
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/strik?keyword=konektor+deans+airsoft In PDF document text
    • http://files.westendprimaryschool.co.uk/uploads/1/3/1/8/131871625/4823567.pdfIn PDF document text
    • http://povul.foodsnobinc.com/uploads/1/3/0/7/130739443/8263285.pdfIn PDF document text
    • http://kanutilor.cyperformingarts.com/uploads/1/3/1/3/131379121/kuzofagemisudujodug.pdfIn PDF document text
    • http://files.freakofabunny.com/uploads/1/3/0/8/130813588/683900.pdfIn PDF document text
    • http://files.newhopelighthouseradio.org/uploads/1/3/2/7/132740763/koxulagimufufebojusa.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/1/0488/1881/5141/files/city_of_madison_streets_division.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2988/0981/files/safe_school_training_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1111/6703/files/advanced_dungeons_and_dragons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8793/6150/files/50415207918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5093/3658/files/32179725839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eb8756-fb9b-4056-b92c-760319b9e676/98579579106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42948a9-84c7-40c9-a643-ada87ed0a9a1/2804397545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cf1555-0045-4404-9ca8-79c53b65c6fa/28506133382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee8c904-f591-475f-bfea-5c6e2a6d5c51/lonovuvirelutilajujojinox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415e2ca4-5c64-498b-9bb4-f2e77d2af76e/95666233317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba37c15-2ef7-47cb-993b-f07d792c75e6/15315841402.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_off0000474e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x474E 4904 bytes
SHA-256: 24603283178cb0049d74b9f46eb82f5d19dc12ef0257fbaebe92d51e5e637696
font_01_sfnt_off0000580d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580D 9760 bytes
SHA-256: f8458110d69b5236be771e8b9a1108f8da84f859853869492be2b50e0a7a753b

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