Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf1a36ea64f2d7e…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 03:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 00657e7443b36eb8a20503d890078b16 SHA-1: c3744e514ad3d888fff492e98bb4505aea8d7e18 SHA-256: fbf1a36ea64f2d7e394e128d36154f09ade61e48dd7285727ed3d75e106ca35f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a mass of external links, including a suspicious URL pointing to 'traffnew.ru', suggesting a link farm or phishing attempt. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to redirect users to potentially harmful content or facilitate further compromise.

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://traffnew.ru/123?keyword=maintaining+social+order+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410703/normal_5f9ebd9977fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f9d23fd6dbfa.pdfIn PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/68547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5f9c481d58113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5f9bdccd0171f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_5f9997f615667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8ee538c8822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f90bae29485b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5f9c138cb36e0.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/vuliwisuwig/paligolixet.pdfIn PDF document text
    • https://jajazitegez.files.wordpress.com/2020/11/72074119579.pdfIn PDF document text
    • https://jadanadu.files.wordpress.com/2020/11/fakuvububulunajagogigare.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/watch_movie_burlesque_free_online.pdfIn PDF document text
    • https://rifuvusi.files.wordpress.com/2020/11/92418151704.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_off00006a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A31 5196 bytes
SHA-256: 8505c3efd41808f69c436ce560e25d25174f1a973c5e70de5194d0e0af815750
font_01_sfnt_off00007bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 9888 bytes
SHA-256: 44a51e70315f247670660a29e7f5a5c87957459924d3b16117ef5f1b61ab8002

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