Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be020fbb07d459f…

MALICIOUS

PDF

34.1 KB Created: 2020-11-06 11:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eb7fe02775e20a79e5933f8531ff248e SHA-1: d98a9987b916675f6f4cb4c59605fd4f1b8e85c5 SHA-256: 0be020fbb07d459f0ef66e7c2e730bea07debc479195e9e3a589c887c56da23f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a link farm, with one external URI pointing to a URL that appears to be a lure for a vehicle owner's manual. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous external links, including one identified as a potential SEO link farm, suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?keyword=2014+honda+crf250l+owners+manual PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f9aa700aff74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/t_test_critical_value_calculator_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e51da2-3175-4119-98cf-77ca53991251/table_of_elements_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/62492861963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f38b92-8b34-4ad5-abb8-ffd652024068/nodazosujakamewak.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/betty_azars_books_fundamentals_of_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5cd72f-2ada-4aaa-89c0-d706dc2d4b30/posotasevevesun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd51d15-5c13-4711-9d10-0f01d52f8988/lajebosizobisoterabuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1902/0706/files/17102245870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/dabozubefisitovubudebulo.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/idle_heroes_wiki_fr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c257f41-2f32-481e-929f-c5d8976c99c6/vadunexeribejasuda.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/gijabuwolafivozi.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_off00004660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4660 5796 bytes
SHA-256: d291eae6bfdb1ef76cd38bd5cca0258d06959aba060af0859d9c5a2f2f10f48e
font_01_sfnt_off00005a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A13 9696 bytes
SHA-256: 200e3baf15e8dcd18bd4b02e3c3324a05652f9175ecc37e438b8191031ade95b

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