Malicious PDF — malware analysis report

Static analysis result for SHA-256 7662404693e21776…

MALICIOUS

PDF

44.5 KB Created: 2020-09-30 02:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 05fa4f79cc2f0f5287b18af58276e2f8 SHA-1: e58f90c34392597eaee8fbbe6291ea603b689650 SHA-256: 7662404693e217769a250351b0609f8ae5fa9f8b61ef90e65a5cf20f1fcfd330
124 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.
  • 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+student+visa+rules+2018+pdf In PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/4625034151.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/xepozazamimiver.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/kuxusimal.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/58089216554.pdfIn PDF document text
    • http://files.whs360994.com/uploads/1/3/1/3/131379956/1c5526.pdfIn PDF document text
    • http://files.sofiya-designer-portfolio.com/uploads/1/3/1/8/131871633/denadudenulukufuxega.pdfIn PDF document text
    • http://jemaxu.rickspearsart.com/uploads/1/3/0/8/130814328/xasawojunuz.pdfIn PDF document text
    • http://files.greatnecktherapy.com/uploads/1/3/1/3/131379832/7906594.pdfIn PDF document text
    • https://site-1037920.mozfiles.com/files/1037920/71867336473.pdfIn PDF document text
    • https://site-1037885.mozfiles.com/files/1037885/92971496191.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/24562132176.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/saxer.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/52341655349.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/65388240063.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/ruxibe.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
    • 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_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 5412 bytes
SHA-256: 442ba3ab0d353eee50529352791c5afc30e48b5cdd9f2a884fc907f435408cfd
font_01_sfnt_off000073b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B1 10364 bytes
SHA-256: e5a43eca5dfd33b4053a6469823b1c0d1efe973af610e65d409e7596455ef427
font_02_sfnt_off000096ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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