Malicious PDF — malware analysis report

Static analysis result for SHA-256 154101f1e08254c0…

MALICIOUS

PDF

34.8 KB Created: 2020-11-07 04:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bd4db87902a69f5a0d06dd4b3a107e64 SHA-1: dda434d99e1650084acf8d12e777b592fcc4b213 SHA-256: 154101f1e08254c0fe5d5f1da17a0ab46a7d1047ab821aca4a39e48fb153bce9
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://trafffi.ru/aws?keyword=st.+ansgar+high+school+calendar PDF link annotation
    • https://wudemivezetuf.weebly.com/uploads/1/3/4/3/134318680/marupudumido_dimija_xideb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_5fa5173d838ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8816a64453e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_5f9a0aa398c0f.pdfIn PDF document text
    • https://sajepenimeb.weebly.com/uploads/1/3/4/3/134368310/b695f3e7.pdfIn PDF document text
    • https://nifosigi.weebly.com/uploads/1/3/4/4/134488788/1830841.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/0fda349.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/wavunot/the_dumb_waiter_text_pinter.pdfIn PDF document text
    • https://tenuxenoboge.files.wordpress.com/2020/11/ropavo.pdfIn PDF document text
    • https://zijitirezi.files.wordpress.com/2020/11/21915622096.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/feletoketaxija.pdfIn PDF document text
    • https://luvajutar.files.wordpress.com/2020/11/road_material_testing_lab_manual.pdfIn PDF document text
    • https://ximubemoxib.files.wordpress.com/2020/11/55456386416.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_off000048df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DF 5336 bytes
SHA-256: 3215f346b3430e0e84d3ebaedf522a6d44eee68f5f048a403f58da037613c323
font_01_sfnt_off00005aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFF 10408 bytes
SHA-256: 2cd30c7ce3c1f3cc234ef735f89398470370cfb9a7bf66651b2872b3aeb74477