Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3c1ceffdc842d6…

MALICIOUS

PDF

46.8 KB Created: 2020-10-04 03:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 80d00a3b1fe662e5a21a11333f812632 SHA-1: 0a55b1899b496f7378e96d3b2950b1c825c47f01 SHA-256: 8f3c1ceffdc842d656d1be802586253b5ca4c017c5b88fe3c607a9c5928e8d1a
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=add+watermark+to+pdf+app In PDF document text
    • http://files.quietwaterpublishing.com/uploads/1/3/1/4/131482991/fidameforulebi.pdfIn PDF document text
    • http://files.gopcffamily.com/uploads/1/3/1/0/131070169/7088299.pdfIn PDF document text
    • http://tulife.alexandradeglise.com/uploads/1/3/1/8/131856316/vemelalilaxakalube.pdfIn PDF document text
    • http://files.belovedcommunitysp.org/uploads/1/3/1/6/131606256/jusulipaterij-wiluzazivu.pdfIn PDF document text
    • http://files.iuppuci.com/uploads/1/3/1/4/131406300/680bb90523.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/6330134882.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/likapogop.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://cdn.shopify.com/s/files/1/0478/1172/3431/files/24978436184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0580/7264/files/pho_viet_dc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/pelabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9b972c-7a42-444b-b4f2-7049879737a8/2047397664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9abe9c-984c-40db-85da-32b8d2c4ed2c/wutidovaxutebifit.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_off00006015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 4756 bytes
SHA-256: bf598f9bf90f0e468c825a14617490795f717a12a9b1335feaeb6957262bd1bf
font_01_sfnt_off00007054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 15928 bytes
SHA-256: 9223a1e37eac9017e04cb524863ec7cd7d4a740af2aff0b8cb94352f8983777d
font_02_sfnt_off0000a0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333