Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87bea10dd2b5cac…

MALICIOUS

PDF

41.7 KB Created: 2020-10-09 18:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6944bc1719847aab66e27fe7018f09a0 SHA-1: 22ec665c3d5217adb585d57f6c2c539a35269d60 SHA-256: b87bea10dd2b5cacb8ba90180f481e774a4fec1dfbe765300b6ec7bad6aa88d7
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=add+and+loving+it+master+package In PDF document text
    • http://fevorozib.peaksandplainswoodcraft.com/uploads/1/3/1/4/131410939/6998861.pdfIn PDF document text
    • http://fuwaz.sharonjohnsonluxurytravel.com/uploads/1/3/1/4/131437079/doremoza-juxufaruvodig-nagopul-geredum.pdfIn PDF document text
    • http://files.livshairandbeauty.com/uploads/1/3/2/6/132681824/3751266.pdfIn PDF document text
    • http://files.roc2change.com/uploads/1/3/0/8/130814177/gokikag.pdfIn PDF document text
    • http://jakalaxi.stgenepress.com/uploads/1/3/1/8/131871726/9906479.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/250b11a3-04a5-4bda-92fb-416a287d9e32/juwilidobivuvakegonuzare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd4e463-bfd4-4c0b-8928-45289a254444/suxidaxofosovojimotolekup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4c299d-1838-41b7-bdfb-425caf51f586/jetoduwawukumewuserez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17eb9aad-76af-45f3-9863-ea423315a154/zadaxovidedipikijinare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb16301-cc7c-44fd-93b6-4f91386ed81d/44179744252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353227d1-f568-4a28-b257-080a45ac6ced/6937336992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ab976d-5b73-42d5-865c-217323d96514/81026488359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bc18bb-223b-4b8a-bf09-06ba5db2ff79/peduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6a804f-a1c5-49e9-8466-3c788915c831/jexevazonufovilumekaxij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6328a99-e479-4e22-aa7f-e019a03c9bb1/govokopeza.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_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 5504 bytes
SHA-256: 1ff14cfe76f3dd03029c737199853aa5ef8a9aabef1c70c689173ff5827b5876
font_01_sfnt_off0000761e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761E 10576 bytes
SHA-256: 733c4b8733ad32bc4b89ad06d9e0423d8ee47400aa2e7e82ae71283e9312a666

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