Malicious PDF — malware analysis report

Static analysis result for SHA-256 428d976760bd5c86…

MALICIOUS

PDF

42.6 KB Created: 2020-10-19 14:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6ed99b5ddd258c2e1fa6e27859fc185e SHA-1: f875bf84fbd4466fed0f67f2d99ff11bbde8048c SHA-256: 428d976760bd5c860f601a8aec1652c598a478ee6238a9e10a8dc9e673e87c27
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://cctraff.ru/strik?keyword=breaking+bad+all+seasons+full+hd+dow In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f8d239be6cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f8b4961a7c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f8ae874b3913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f88ed1cec827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f8be04dac485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8d3ed182201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8b8f0ce1077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f8cfb265b2cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f895b869ef87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f870e3e0497d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f8c48495e765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f87bfe6c1d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f8ba16ad9ff7.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/37bce829-0c57-446f-931f-cbfd4e1120ca/wifawov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d061ece-76b6-4fee-b150-7be51b0ff2d2/68463529619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df59d290-a34a-4000-b180-5cdd06fd1e06/xerusobizululekidazov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db27e9bf-4f18-45bf-ae0f-ee67a12ff0b0/balodap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429cf3fd-aef2-42e2-bcbe-d66605bb2f2a/33651989137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2b8472-9ffe-4b70-be91-868f873debb1/54362678914.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_off000067ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 5512 bytes
SHA-256: aaececb8b459bfe2a530a282f152ae281f1c9245b4bb4773eaee87aa66c561ce
font_01_sfnt_off00007aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 10024 bytes
SHA-256: a07c38cf345c038a3b71cf5ec4497a56233669a5b74ea1e3b904647b45eb17c7

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