Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc2453cdb436de2…

MALICIOUS

PDF

40.9 KB Created: 2020-11-07 14:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: a9885bdddda9ee8cf7ed234b7a37676d SHA-1: 234fff2e6db7702a466ccba05368f163fb41c12c SHA-256: 0cc2453cdb436de27f094af746adc97938c8e837c3a2d1105d2f82e1f9b6abf7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafficel.ru/wb?keyword=just%20busted%20mugshots%20knoxville%20tn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f93ea81441eb.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://tuvexora.weebly.com/uploads/1/3/4/6/134618292/d65a610873ee.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/luduluvemaker_vesugusadire_dusuwul.pdfIn PDF document text
    • https://zukinubugepar.weebly.com/uploads/1/3/4/5/134514864/8809f0618c94b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fa12aaec3b24.pdfIn PDF document text
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/0cf63574.pdfIn PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/3716875.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/2a369f65f.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/gexilufefovok.pdfIn PDF document text
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/sikov.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/wowesuxotobibulutexi.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/piwor.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060eb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060eb.bin)
    • https://sovezetazej.files.wordpress.com/2020/11/nugewekojasonepujanetim.pdfIn PDF document text
    • https://zavuzujovati.files.wordpress.com/2020/11/spss_veri_rnekleri.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/ernst_cassirer.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 extracted file (font_00_sfnt_off000060eb.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 5256 bytes
SHA-256: 69f1fd5ffcb065b51691e09f0f44644299199f582abf41082700a576383aca2c
font_01_sfnt_off000072a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 10596 bytes
SHA-256: 1533f160fa3aba1af940fd2508d8622b2285969aaeb12d1d17186071958054f5