Malicious PDF — malware analysis report

Static analysis result for SHA-256 033df220df37f3c1…

MALICIOUS

PDF

39.2 KB Created: 2020-10-15 15:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5a9da1e121cedaaaa73f83660dadbe0a SHA-1: f2856602c3522068c02c069128ae76c9370158f4 SHA-256: 033df220df37f3c14cec1cd0efe03b6451ebc5ac1846cf63e50223590774989b
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=e+library+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f87b02297ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f870f9043b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f878445292a2.pdfIn PDF document text
    • https://site-1039227.mozfiles.com/files/1039227/7772697095.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/toranetonokalido.pdfIn PDF document text
    • https://site-1043176.mozfiles.com/files/1043176/kifojej.pdfIn PDF document text
    • https://site-1040663.mozfiles.com/files/1040663/xurebadeniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f86f59f38267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f874e7da0ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f875fa9663d5.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/fc206.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/7981901.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/bulivovajuzonabazide.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/10761175510.pdfIn PDF document text
    • https://site-1039992.mozfiles.com/files/1039992/50400731322.pdfIn PDF document text
    • https://site-1039329.mozfiles.com/files/1039329/65666502621.pdfIn PDF document text
    • https://site-1043245.mozfiles.com/files/1043245/9689241706.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/2c6da2f4-2c2c-4768-89cb-593c0e550f05/18191071586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce71ead5-628b-4369-aadd-b4bb4d79dca6/17835115428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcaec1d6-a100-4ae5-8e41-5fa05cfe5561/fujewakopag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff18ea1-0e86-4e7a-9e4c-d9e04613f154/kafojugigezalelawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/837d891a-0044-4273-87f0-952662243f3b/lunazuwemakida.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_off00005987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5987 5148 bytes
SHA-256: 87e48eda477c25b17a6e780a3053ea8b791feab2588103fb75bcb2e2f2aacec5
font_01_sfnt_off00006b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B28 10500 bytes
SHA-256: dcbc4321143acfc00b03ef932591f579730b024f9bd1936fb5a6a703b952488f

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