Malicious PDF — malware analysis report

Static analysis result for SHA-256 1807307cb76b3516…

MALICIOUS

PDF

40.4 KB Created: 2020-11-06 19:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d184e3e2cf121609feb400250d419b82 SHA-1: ea9600e9ab81b729bb3db6dc4c2afe285944e9bb SHA-256: 1807307cb76b35161600ccc0913bcd245ec9155776e2baa2d21ad7c177fb127d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. One of the embedded links points to 'https://trafffi.ru/aws?keyword=sword+art+online+alicization+episode+21+sub', which is likely a lure. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the structure of the PDF and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful 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/aws?keyword=sword+art+online+alicization+episode+21+sub PDF link annotation
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/boweziz.pdfIn PDF document text
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/7467905.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/6520541.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/pevoxiravuwe.pdfIn PDF document text
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/puwawiw.pdfIn PDF document text
    • https://wetifojijebene.weebly.com/uploads/1/3/4/4/134474841/dabe9a1121fa.pdfIn PDF document text
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/4451120.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/burixivofodojewe.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/dogazisuze/ccie_service_provider_v4._1_lab_workbook.pdfIn PDF document text
    • https://wuzemasotiwa.files.wordpress.com/2020/11/geneligojumotufitujoleno.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/green_t_lindon_youngsville_la.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/defawum.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/boxhead_2_unblocked_hacked.pdfIn PDF document text
    • https://gazolikid.files.wordpress.com/2020/11/nafixidesakikiguvofex.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_off00005ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 5636 bytes
SHA-256: 69486eb1b316736144f29269cc3cab56d7b758f68c5a1300556b71d56678aff0
font_01_sfnt_off000071f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F6 10088 bytes
SHA-256: 6333937e1bd4680c884f223558c2fcc6ca5fd957d599bcbd9efc04c59625db97

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