Malicious PDF — malware analysis report

Static analysis result for SHA-256 5762b7379486f37b…

MALICIOUS

PDF

44.0 KB Created: 2020-11-07 08:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 0b81da20655b060081d3820f63e8e5f7 SHA-1: e235f2076f386bc2bab6ad49ecfc1a9219030e95 SHA-256: 5762b7379486f37b4de245aec27a240cae5630600752488d2fb94dd900881a33
136 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.
  • 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://traffset.ru/123?keyword=author+of+a+guide+to+confident+living PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fa5d25d04484.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/serep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f8fac192ec4d.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/kinogubeta_jazuvijedajote_laweburilud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_5f93fc007077d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f8a6fb56e6cd.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/magovugilari_xukozodi_kotovesopuxax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5f9a34e42400a.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/4dfdcd9a-2b74-4c2b-b247-e4348c754980/fisagirilijabawu.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/sandwich_stem_academy_sandwich_ma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be388f0-a06f-4b71-966e-bffb6b99d542/primera_sesion_consejo_tecnico_escolar_primaria_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb04aa3-4087-43b4-9aa6-de0ffc2971e5/55454420659.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_off00006e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 5152 bytes
SHA-256: 28062b8851775b6eee233e4be2ebe699c9a57b1291aa3e71468925fc3ea9d7af
font_01_sfnt_off00008011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 10272 bytes
SHA-256: 8c0a6e02cb7ceb4f3cad905a6f2220bf1afb7185a0694dc4c0c278f0131fdfa9