Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c57d3cc0ca10d2…

MALICIOUS

PDF

71.2 KB Created: 2021-02-24 13:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8a87221f62152ddf92135e9f5cf267b3 SHA-1: fa98ab535ef8a82bacc2bf82734b4e8a0de6b461 SHA-256: 31c57d3cc0ca10d26a1a719558cb8dc32ced2083351341afdc3af926fbdb7e20
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=nys+special+education+certification+test PDF link annotation
    • https://bepirujeli.weebly.com/uploads/1/3/1/8/131856565/4460521.pdfIn PDF document text
    • https://vapatukubarokul.weebly.com/uploads/1/3/0/7/130739856/1907147.pdfIn PDF document text
    • http://maykistore.ru/joplin_tornado_damage_2011gj64e.pdfIn PDF document text
    • http://morpeoplelife.ru/remutijumuvizavejawixutnz3z.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/rawix_sovurama_jipidozixulomom_zavumuwe.pdfIn PDF document text
    • http://islandlandscapesbb.com/what_are_the_basic_elements_of_poetry1j2gg.pdfIn PDF document text
    • https://zesudegefomoga.weebly.com/uploads/1/3/1/0/131070027/6183383.pdfIn PDF document text
    • http://selomankap.space/cards_and_castles_discordp0itm.pdfIn PDF document text
    • http://predouche.xyz/blank_face_sheets_for_makeupzd34a.pdfIn PDF document text
    • http://tiktoktop.design/how_to_put_together_kong_dog_crate37kod.pdfIn PDF document text
    • http://gumimexolekedid.22web.org/microsoft_powerpoint_gantt_chart_template.pdfIn PDF document text
    • http://amsidisi.xyz/vejenalifizatm1c8y.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/e555171b33bbb8.pdfIn PDF document text
    • http://merishwheelrecords.com/superman_returns_game_free_for_pcvke6y.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/pilazi/performance_testing_and_scalability_testing.pdfIn PDF document text
    • http://pekudus.rf.gd/womezedejobawofub.pdfIn PDF document text
    • http://dupevinituz.epizy.com/96480329065.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_off0000d9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AB 5220 bytes
SHA-256: ce9c1f0764a254226adf6c15d0541063999a4ac0789a932e459c320920ef5c2c
font_01_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 10528 bytes
SHA-256: 6e7258de7755d8608ee6599b39c4680cfd9f4c552ab541e3ed00721c95a57379