Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfe98512a81baaa…

MALICIOUS

PDF

46.6 KB Created: 2020-10-03 02:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 217ef156864522436fba4cc61e52bf68 SHA-1: 9df57cad769d9daa7907bf5fe027b0a04c5f4a08 SHA-256: 1bfe98512a81baaa444ec438ad9818fda9d43b4fe65d21362328c57a52ab5357
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/strik?keyword=palme+biyoloji+konu+anlat%2525C4%2525B1ml%2525C4%2525B1+pdf+indir In PDF document text
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdfIn PDF document text
    • http://welakag.albertabands.com/uploads/1/3/1/3/131398285/4178165.pdfIn PDF document text
    • http://rawotusek.ourcampinc.org/uploads/1/3/0/7/130775997/kajeso_bazepazud.pdfIn PDF document text
    • http://files.valleyrootsfoodhub.com/uploads/1/3/0/7/130740344/fa8b50ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b4c4624f-bf02-4b94-8ee8-b2ae94db9c18/dipagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c1e52c-38bf-4fea-971b-1bf7d2b436e0/73593102919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b4029e-0e78-4089-b9ff-0fb3322b937b/41493512903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e747ef45-b3c9-433a-b408-4b4f952a9d28/guxipafisunenedujegot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a71ee74-7747-4b7a-b2be-7c9ff83f724a/naguzexemalike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3194ee5-90e6-4c8d-bcd5-9cad2f1bb5e6/70837429024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98b6882-107a-44f6-9313-4d6d89821a59/finuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f732cf35-6994-4c66-b36b-7f6a0e8adbdf/34046361908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa54471e-88e8-422d-bb40-4316bc6e320c/somagugijaminumedube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4443cf-e961-445d-b26f-978af2b82cad/foleto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/22375473433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8938/7935/files/rulemotuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/flor_y_canto_tercera_edicion_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9407/6312/files/96555124242.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 5304 bytes
SHA-256: cbda9978905e8938f0994ac7ef522f1f178438eed378f44d0ebdd16909ba71ae
font_01_sfnt_off000076e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E1 12244 bytes
SHA-256: 6f14fe7569feec818bff9810b904df9c14c3b1b11d24d473784afd792b8768cb
font_02_sfnt_off00009cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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