Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad4250568a3db2f…

MALICIOUS

PDF

50.9 KB Created: 2020-10-03 08:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5e44b7cccf554a559af48ca4025b30ce SHA-1: ecd61c44ec3e8e2cb1e5733994504aedfe541458 SHA-256: bad4250568a3db2fbf0f38c406528527ad369d24ddfc99112f6ad99adfae655c
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=m%25C3%25A3os+de+luz+barbara+ann+brennan+pdf In PDF document text
    • http://files.papayasplace.com/uploads/1/3/0/7/130739362/3020252.pdfIn PDF document text
    • http://juzunaz.haciendalacapullana.com/uploads/1/3/1/4/131454065/dilasikafeb-pekiroxadoluz-pugefipoziva.pdfIn PDF document text
    • http://tipusip.pspathletes.com/uploads/1/3/0/8/130814328/tumuzubilapalapufe.pdfIn PDF document text
    • http://kuwuvan.trulloneglialberi.com/uploads/1/3/2/6/132681670/vojorupifodej.pdfIn PDF document text
    • http://tidakujew.neardeathexperienceuk.com/uploads/1/3/1/8/131857916/4baaa41d28.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/13963986309.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/70063708586.pdfIn PDF document text
    • https://site-1036881.mozfiles.com/files/1036881/zukekuxi.pdfIn PDF document text
    • https://site-1039651.mozfiles.com/files/1039651/saxolegarifajopolawexoxi.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/dc0dd7f8-22ea-487a-836f-30c8f8d99a47/15972140334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ee09d8-83aa-42d1-8bca-a45c78efd6a9/sozelev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd96322-23dc-48a9-8c9c-193d206f19cb/39680354048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/sony_dvd_player_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/daisy_red_ryder_bb_gun_parts.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_off00008204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 5548 bytes
SHA-256: d4f86ea3cb3c0ec3a6b5ec617414f69289d5ef98189e900932c3b836806fe096
font_01_sfnt_off00009466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9466 13844 bytes
SHA-256: 4d6b48bfe45b1ac967458c13fc825da33f687ef2bf8ea72b84dee0b5f2b5ac1f

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