Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94571cf85296a68…

MALICIOUS

PDF

34.7 KB Created: 2020-10-06 14:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1f44c552a2820ccac92136007d5c2ce4 SHA-1: ba173b3daf3b6b1bd5b2755ac69de11ad92cb264 SHA-256: c94571cf85296a68ef04f0245dd7c5c45eca6e78c131900b989ab423e31aa92f
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=logic+the+essentials+patrick+j+hurle In PDF document text
    • http://jonofaga.zepreloading.com/uploads/1/3/2/6/132682006/fotejuliw.pdfIn PDF document text
    • http://vatimo.amicilyricopera.com/uploads/1/3/2/7/132740250/nujifug.pdfIn PDF document text
    • http://wuman.alexpatrickdyck.com/uploads/1/3/1/4/131437508/mojoxowozivuxesog.pdfIn PDF document text
    • https://site-1040094.mozfiles.com/files/1040094/65457208663.pdfIn PDF document text
    • https://site-1039386.mozfiles.com/files/1039386/29589423287.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7112/7208/files/50144852092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3090/2946/files/xivegoxaxesubexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/38445437787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b373a301-a0a0-493f-b630-ad96a8c53ffd/furotoxawaluxonakak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9b36af-662d-46b7-bc46-84fee680bbcf/11712494919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be072f3c-3297-45bb-88d6-a5ae15d0f850/41129766976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfd394f-4530-4d57-829e-e68d6e5f0af9/walapujidezasajizix.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_off00004a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A53 5276 bytes
SHA-256: 761dc2ff060668b211106804f517f6f9bfe1ea3c74adc0af8b5d111256b4d598
font_01_sfnt_off00005c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C55 9884 bytes
SHA-256: 838f2722a53fdcf5745bc1782a3c65b749256beb895296248d6304726e31b778

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