Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b1342f36ce7c14…

MALICIOUS

PDF

55.5 KB Created: 2020-11-06 11:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f8fca018bb00612faa40210183a2bb39 SHA-1: 1f3790abb724ff5679ffb5b125254edb1daa374e SHA-256: e4b1342f36ce7c14812ca6baedbe1440ee3bca916d122b4ee7de34c81382c51a
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=paralegal+training+manual+pdf PDF link annotation
    • https://dosedoduni.weebly.com/uploads/1/3/4/3/134347632/5028047.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/suzipi-lamobewuluwo-duxekafisado-pezikar.pdfIn PDF document text
    • https://gefelamanak.weebly.com/uploads/1/3/4/3/134353999/1f2ea7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f98e659889aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8cf19a35261.pdfIn PDF document text
    • https://mesifadenox.weebly.com/uploads/1/3/4/1/134108947/2741527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd32f1d1-6003-475f-88f9-7e636ab50124/10_enunciados_admirativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbed3cc8-97f3-4892-a789-3e0e4921b58b/fokamugaxovisisopuzuwuvon.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/vukederatisomun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df06fe7a-511e-4fe5-bb9b-d7a291baaa3a/defon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a69267-e5d5-424c-a6b1-baf75bba6260/10015947824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62da1af2-f928-40a6-830f-006784a1a7a9/texas_waffle_maker_flip.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/23613854490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57259f04-1bbb-4c13-a637-80afa326c1c8/nodenerigeximago.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_off00009b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B42 5184 bytes
SHA-256: 3943b8517a0810447345a42b4f38df141e72d09f5729076498fbcf0a6aed3859
font_01_sfnt_off0000acd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD1 10632 bytes
SHA-256: a6cc38be91238d4d68087497658354d8e7d0ca547858cf0d677276fbb023769b