Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f23a5dfdcd7e5d…

MALICIOUS

PDF

51.9 KB Created: 2020-11-08 14:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8716efa9b59624a21ccafb6ffa75d12d SHA-1: db2589631e330f1b89b2f151c99bca16eb90dc76 SHA-256: c6f23a5dfdcd7e5d15b0196cf08ef049fad463058e486a7d787eac5d1640570d
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://traffmen.ru/aws?keyword=eighth+amendment+bill+of+rights+guarantees In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_5fa58b50cc38f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f89cec5bcb49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f88a0cc48e79.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/jakimizefakofi-xikelegawa-bebudabizegevi-fobusenux.pdfIn PDF document text
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/6777853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f99c23310c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f8b4b8466f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413005/normal_5f9ed13582bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8713627dcdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f893c3214446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5f955b250f3fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f96436942694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://karepoxazul.files.wordpress.com/2020/11/web_dynpro_abap_tutorial.pdfIn PDF document text
    • https://kepajeji.files.wordpress.com/2020/11/nijogunedeluveritoj.pdfIn PDF document text
    • https://pixetimel.files.wordpress.com/2020/11/10564936711.pdfIn PDF document text
    • https://juravixewede.files.wordpress.com/2020/11/55799678871.pdfIn PDF document text
    • https://gexevoj.files.wordpress.com/2020/11/definition_and_basic_concepts_of_biosystematics_and_taxonomy.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009e89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9E89 21384 bytes
SHA-256: 42cf8fae9803678350e2b04039dd8532b13b438da3d97c189f247c94c51fa5af
font_00_sfnt_off00006665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6665 5420 bytes
SHA-256: f54dc582054568a5331439b6893cd63ed0ab356cc6f5528e1e6af682d3344ebf
font_01_sfnt_off000078aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AA 11196 bytes
SHA-256: 308d0f1f5a11e709c1d77031203c03f77ad13f6bad1ba4a7de4206fc1344cd0f

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