Malicious PDF — malware analysis report

Static analysis result for SHA-256 54be36decb20a606…

MALICIOUS

PDF

37.1 KB Created: 2020-10-10 00:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 383c8dde3baec03fcc7d8ccf56dae130 SHA-1: e8b5182952aa2dba85ebfdc872d1ac48e48774c6 SHA-256: 54be36decb20a6063d28d80a85b64e8a22ab703244472c721e9095f7ed97231f
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=canada+411reverse+lookup In PDF document text
    • http://files.malcolmmcewan.com/uploads/1/3/2/6/132682035/daxarozemejobix.pdfIn PDF document text
    • http://files.stephenfrausto.com/uploads/1/3/1/3/131379035/fuzozibaripuvilijize.pdfIn PDF document text
    • http://files.little-childrens-bible-school.com/uploads/1/3/2/7/132712324/9200231.pdfIn PDF document text
    • http://files.suemurrayphotographer.com/uploads/1/3/2/8/132814552/7543967.pdfIn PDF document text
    • http://files.unfurnishedfilms.com/uploads/1/3/0/8/130814032/68be87a4.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/14558163531.pdfIn PDF document text
    • https://site-1038948.mozfiles.com/files/1038948/xakelaxejotabo.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/853b3a03-e034-4589-9698-e8d06f4b3591/bupalagejokexive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c26d4e-f8ac-4794-a6ed-319775e434c1/varekekagumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589f5547-6696-483c-8f48-0918617c3c32/raroxoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37639dd-3fb2-4a0b-985e-4bed4a3a8168/xoboluwawajijusuwepupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e0f97c-802a-479e-9516-a8e0de9cfa4e/tokapepifuletexadifetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7068c91-1cf5-44c5-9ece-ea5ce00299c7/tudemexom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068f98db-6487-47ee-8c34-ca2c2c996125/fuzisuxukolefasedakiguvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370736ba-5c1c-4375-9158-67110489d53d/69719516219.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_off00005451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5451 5120 bytes
SHA-256: f67cbb3f17595f89d349246ba3673937a88c230aebe4f445af06dff459df6f4c
font_01_sfnt_off000065da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 9852 bytes
SHA-256: c9a3b38dab80adebe910aa8cf6dd1fad747d6dc21bb95bc676bb068482ee87da

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