Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4650ea76ddd11e…

MALICIOUS

PDF

45.6 KB Created: 2020-10-05 21:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 41ab5ce43cf7104fa5463940f1502bae SHA-1: 87adeac3a6fc792d3651e0805cd209ff8b8cc0c0 SHA-256: 6b4650ea76ddd11e02728a73cab0e1fd066b1b97fba137b2b485de09762c4a19
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://gettraff.ru/strik?keyword=groesten+haus+pack+a+punch In PDF document text
    • https://site-1043455.mozfiles.com/files/1043455/pelinosiwadeju.pdfIn PDF document text
    • https://site-1045312.mozfiles.com/files/1045312/bijuxexibas.pdfIn PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/latedagalevidu.pdfIn PDF document text
    • https://site-1038985.mozfiles.com/files/1038985/gesakuboxaw.pdfIn PDF document text
    • https://site-1041285.mozfiles.com/files/1041285/dadofobe.pdfIn PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/wamekisuvu.pdfIn PDF document text
    • https://site-1038477.mozfiles.com/files/1038477/84258926106.pdfIn PDF document text
    • http://xaren.builtmywaymedia.com/uploads/1/3/1/6/131637517/fuxalutabividim.pdfIn PDF document text
    • http://virofejug.centralcoastwineworks.com/uploads/1/3/2/6/132682883/jogesimofupop.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://uploads.strikinglycdn.com/files/c45ca203-5605-4ec0-9782-d0a131907083/83741039332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1621823-b7de-47c1-87cd-c9e4a837d9de/47094301007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a3875b-3eba-49cb-8ef1-b61402619681/xabijapajodudemad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec87abc-8447-48fe-ada7-a927e314a071/51850735752.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_off00006644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 4916 bytes
SHA-256: 55fb1531f1e69e635d006195b855d1580203d36149e662f8839869e3b9a86600
font_01_sfnt_off000076ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EE 10740 bytes
SHA-256: 8b2da8f5317fcfef164bbe1ba9c26a9f139454b45e13e6cc6fbcddc388e0a082
font_02_sfnt_off00009b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B93 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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