Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a262a52438c84bc…

MALICIOUS

PDF

48.6 KB Created: 2020-04-10 17:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25
MD5: b1a6cc58dae62471a36230ec1eb10cfc SHA-1: c5bdb4a05051c07fea19fa95b6c3eb22329771b2 SHA-256: 7a262a52438c84bc56c4b7c9a4c6edd2c4ee2cf65dc1f4d7188e9e5b3110fcfc
96 Risk Score

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 http://eclipse-boarding.com/uploads/1/3/0/4/130483697/130483697.html#mcmillan+study+guides+inc PDF link annotation
    • http://thelostkitties.com/uploads/1/3/0/9/130969458/9623108.pdfIn PDF document text
    • http://otpyp.com/uploads/1/3/0/8/130873717/c8cf024.pdfIn PDF document text
    • http://drjkrohnconsultant.com/uploads/1/3/0/3/130323620/4950138.pdfIn PDF document text
    • http://theshands.com/uploads/1/3/0/7/130775623/0806c075f4c.pdfIn PDF document text
    • http://getpinbox.com/uploads/1/3/0/4/130483629/af5d8cda2db6e40.pdfIn PDF document text
    • http://progressivelies.com/uploads/1/3/1/0/131070506/fexisuselafukipiz.pdfIn PDF document text
    • http://philprops.com/uploads/1/3/1/3/131398440/gufag.pdfIn PDF document text
    • http://mistress-death.com/uploads/1/3/0/8/130873728/0f129092f0d4ec5.pdfIn PDF document text
    • http://moorerealtymanagement.com/uploads/1/3/0/6/130640051/5d345.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 9440 bytes
SHA-256: a2427dd0ca508f555db2956aebbe112472ff2cd8d42dbbee49cd8d4fe82258d3
font_01_sfnt_off0000ac75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC75 2600 bytes
SHA-256: 41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee

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