Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23adad0a087b771…

MALICIOUS

PDF

44.5 KB Created: 2020-10-30 21:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b9e312850f71196593b262f7ac744244 SHA-1: 599923f85f2e755af4376c955378b48bf60fbd36 SHA-256: d23adad0a087b771aa48d70964e80d37cc17cdcfe66e28b553a7ffe7cb75a9d0
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/pify?keyword=lord+you+have+come+to+the+seashore+pdf In PDF document text
    • https://wizamezuladad.weebly.com/uploads/1/3/4/3/134351213/xazuzapeli.pdfIn PDF document text
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/b524180699628.pdfIn PDF document text
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/funumifeleni-guzepebuzo.pdfIn PDF document text
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/lekusiboravom.pdfIn PDF document text
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/5829239.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/4050184e-50fc-483f-88dd-fb7bb22f2577/relotomafelof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f47fa76-fe19-4754-bcbf-22b9bbd1dbbf/rekibirimifonojopuludozus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66329a22-7799-48ad-9e36-ce0c5c464452/dejejasokobiwavuxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9719c01-1067-411b-b3e6-ab0cfb1b8601/459284353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf18e7d-90cd-42e3-bd7a-9acc335b7bb0/goxider.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8190/6361/files/61032228489.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_off00006d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 5464 bytes
SHA-256: deb4e2a4a2dcef71cd2108d9c429d07589cca30b3981bf9ccc809a95223a7f43
font_01_sfnt_off00008010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8010 11516 bytes
SHA-256: ba7b051dd379f0e26e04e17f5e06db6e667ba2ec52537863a3282e23f7590e9f