Malicious PDF — malware analysis report

Static analysis result for SHA-256 743430da037a3ee8…

MALICIOUS

PDF

39.0 KB Created: 2020-11-06 13:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: f3b97fdc559942c29a8791285751eabf SHA-1: 30b5de407355daf66446b457d894a099093003fc SHA-256: 743430da037a3ee8f0907f755e9eec63f30f006b4beb3cec09ffa0ec0c03e76f
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffset.ru/aws?keyword=example+of+instructional+materials+for+edtpa PDF link annotation
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/5699656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f9ea473017bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f9ee8a92a092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f9286cf93b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f9d2acdc148a.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/sujegelokebazu.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://wepoduxusuduxi.weebly.com/uploads/1/3/4/3/134306179/ragebez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5fa1f8b335df8.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/kuronidum-sevus.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005983.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005983.bin)
    • https://s3.amazonaws.com/wofaxil/27570456291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ee3d08-c91f-46c4-bcbc-4e9a90a52b3e/87724883676.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_off00005983.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5983 5328 bytes
SHA-256: d86655e0a4a291974fbc4f4440104d42b29f0337067183fdab7a4e4db275cc58
font_01_sfnt_off00006b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B90 10420 bytes
SHA-256: 625f8df3697bf529502f9fccd11f71693859caff2cb9c4d7a522a2c687febcf7