Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6217c39fe7fa0f5…

MALICIOUS

PDF

43.5 KB Created: 2020-11-06 14:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 7d89b045666ec8a6ed18d33c10ace3ee SHA-1: 6cff6a4560fddb233ac9faa3d32d854bd24aebc0 SHA-256: a6217c39fe7fa0f52ca16249c326aa3c4bbc513e642c9f95038259c3cce4b51c
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://traffine.ru/aws?keyword=100th+day+of+school+art+projects In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fa0932750ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5f9cbe894adde.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/femesuzef.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/5c4134f0-fd27-4773-97cf-7bc6116b48bb/37914567569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840e2060-4934-403c-8737-a1cc92b0499b/pokon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7492/6777/files/rabusenizalewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776a02fb-d69b-4bfc-98dc-6411e906b914/sojed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54fd0b88-fe60-4864-bfd8-bb7b3a64de82/44529169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9cd845-d49f-4cba-a426-5b4a5563b071/64506685987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fef68e-0278-4c77-9db2-8c6ca00c8c98/19465818318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc19443-254e-43ae-a99e-cc7f42b62c62/97813362895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68a9ad-7e14-4981-a160-0e6a028edbb5/ee_topics_for_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b3de69-9650-43e7-acd7-6980b1bc35f0/revit_design_options_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f6b09a-cd70-4b64-9b08-2239356ca0e6/dadibix.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_off00006725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 5520 bytes
SHA-256: df9a005a202d5f14e1ce2894ff09466081b6c38fe396b796313913e22a4e5f61
font_01_sfnt_off000079f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 10996 bytes
SHA-256: cc022d7210776f3048829950076669ef87ead9b5088decb07305fec703395924

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