Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8af576924596c2…

MALICIOUS

PDF

35.1 KB Created: 2020-10-08 16:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5336704dad07e2ed726972c1e110cb6a SHA-1: 408fbac3885bc3d9ce4a4f24d7862a261237a50c SHA-256: eb8af576924596c2e98d3e02cc37a584cd2a9a76213cbfb2233e76544c10e4d3
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/pify?keyword=mindware+perplexors+pdf In PDF document text
    • http://files.hearthtarot.com/uploads/1/3/0/7/130739831/jemewug-mowikod-sevefadud.pdfIn PDF document text
    • http://files.girlsrockourworldsummercamp.com/uploads/1/3/1/8/131856112/784fe73d5b200c1.pdfIn PDF document text
    • http://files.filebankinc.com/uploads/1/3/1/8/131857338/2972644.pdfIn PDF document text
    • http://noseka.antoniocremonasalon.com/uploads/1/3/1/4/131438563/vomanawisuzaris-kodamomimuzozof.pdfIn PDF document text
    • http://files.freshkratom.org/uploads/1/3/1/3/131398046/448fd72aed1.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/5f63c3c8-c7e5-4bc3-bb4b-b4024b6f49ca/18873302490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a4a051-f48c-4a1c-aaa9-f9e2faa9b7cc/32618003777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfc6976-7833-4f4a-8c19-c44d444daf58/renukinidowaxorigoletadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4e6b1d-665d-4190-880a-30a576b54a13/fajin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b105ba-8972-4c34-afb7-41e06a324424/6834211334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73158c56-39c8-487b-a6bf-d93ce603eea9/lobifijonodujoxegubitegep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428f0ca4-27a4-4504-804f-457448157fca/53716597797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f71f2bd-4525-4e04-b026-584e208fd3b5/porara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc81163d-5ca2-4bcb-920b-58be02d1eec2/powufavuwusirawof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8332aa54-63a3-408c-a747-1e11a5546384/gojotosipebilafigadufid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c239b43f-9e88-41f0-9186-226b58b512fb/ferekasojotelutona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfb874d-ce2c-42ef-9c84-4adf6ded8841/nevunafadufobowerijujikon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1dc95ea-436e-4e3c-98ff-ac569616d857/rofamego.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_off00004c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C01 5200 bytes
SHA-256: 24a0d1b91bea1525d8e3a9d42f620260252ebb474f1832f07bbc14e59149afa8
font_01_sfnt_off00005de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 9768 bytes
SHA-256: ba44268dfbabfc9437bc02ea22e5e4567917a94ceb67ea6ed785a541d7f3c20a

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