Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b35ad864022546…

MALICIOUS

PDF

35.4 KB Created: 2020-10-02 00:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4397df2afc95a1b5fcdad07799fcfb7b SHA-1: 7b5b715668b65196cc2fd4d7774b4117f7af622a SHA-256: 52b35ad864022546b065d703d8d68e2ee9eb33eba38dedc66a8bd90489ac7c41
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=clayton%2527s+electrotherapy+5th+edition+pdf In PDF document text
    • http://files.ucgallery.com/uploads/1/3/1/4/131407469/7314858.pdfIn PDF document text
    • http://files.realisto.net/uploads/1/3/1/0/131070313/savako.pdfIn PDF document text
    • http://jezagafu.localhomegrownmarket.com/uploads/1/3/0/9/130969204/kefenab-giwulesodovodit-sudidiwinawi.pdfIn PDF document text
    • http://fuxije.flatlanderclimbing.com/uploads/1/3/1/3/131380183/885877617d344.pdfIn PDF document text
    • https://site-1038728.mozfiles.com/files/1038728/kawagifomujefom.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/20072633212.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/fd9d1c8a-8f69-4553-baca-9157bd2071d4/momaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5dfb193-7e65-4e70-9f74-ad038c64a2ad/mawalelejowabiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc0159d-38b3-435f-820b-1f46000515c4/16865178281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f31c818-9e60-4c52-a56a-d6e285c5058c/56962710559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa2ed2d-b8c2-42f1-912c-a52d5f4b156e/xaxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68c5357-75f4-4890-b0d2-b7e8fddc9f65/29650611069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f8c963-acd3-489a-9723-3aee1b44e2b6/6089614041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed411104-4cf7-471b-818e-d2698130888e/42600448549.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A68 5408 bytes
SHA-256: f3d9facc55633fdc471ca8c8059a42bbf6088c26f770463c99a3d1da18d0e9f7
font_01_sfnt_off00005cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD9 10436 bytes
SHA-256: 4b3b157802cfcd132be4b1f9b82c553981543028210534f50c8845396f1900c1

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