Malicious PDF — malware analysis report

Static analysis result for SHA-256 a216cd8062244165…

MALICIOUS

PDF

64.2 KB Created: 2020-11-06 08:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 12f127645bb44b902c3b706bd29b22a7 SHA-1: 077f174465b01cafc96ea8b02f460c8b13748811 SHA-256: a216cd8062244165c53c09f9808cb97bf7407b2fdb8d4f87d08200062ca1fd59
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?keyword=joey+rodriguez+usps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453563/normal_5fa4d7b690ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5fa3da74e2c9c.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/e2fecaab-8fdb-4d89-8138-5125affd25ea/watch_one_piece_stampede_online_kissanime.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/bulk_trash_pickup_schedule_fort_lauderdale.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/21165163583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4403241d-4478-4190-97ba-9b7cb92d2434/doughnut_cheat_for_simpsons_tapped_out.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/45819715906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907fb765-7e28-4510-82dd-ad21a23373e0/fukipifilu.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/baratoloripobarazimilumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9558/9018/files/nintendogs__cats_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f27b908-6c31-44ca-8574-94e660046e60/boogie_woogie_reindeer_girl_in_red_dress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89d37af-bb25-43fc-9985-430a251fd148/bana_masal_anlatma_full_hd_tC3BCrkC3A7e_dublaj_izle.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/grim_dawn_arcanist_build_levelskip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cbbd4a5-dcd9-4df6-8e79-f0baabf7685e/kilidirirepawozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b590cb6-e90a-4d0a-962a-c7ba140c2fce/59926632166.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_off0000b8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D3 5024 bytes
SHA-256: 24a09f325ae5b1a5dfc5d313e9cf774b8de0f917b8108a5652357ad5c63b3747
font_01_sfnt_off0000ca10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA10 12236 bytes
SHA-256: 5903f55775d78b26477476bb53f97b13ddac441179bd02a4722a9e1e22d17e80

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