Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c57865d7996f52…

MALICIOUS

PDF

69.3 KB Created: 2021-02-26 23:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2c5dbbb5c32a26335e82241e134c0930 SHA-1: ebdba6c4b0925e5b79f6be4d2da9ee485cc0660f SHA-256: f8c57865d7996f521aa06fe09ed7f069456b46d162b00ec55c244ffe86b79659
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wb?keyword=how%20to%20lock%20a%20schlage%20code%20door PDF link annotation
    • http://miwewumexurigan.sportsontheweb.net/business_vocabulary_in_use_elementary_to_pre-intermediate_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601c8809c6d98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_6021642f79b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_600dcdc13ac41.pdfIn PDF document text
    • http://instapriz365.online/el_libro_del_zohar_completody61l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_6005776131a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5fd775289fbaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5ffde420e3119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411270/normal_5ffd777d73c58.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/kofabube/86457082065.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/16210021645.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/busqueda_imagenes_google_android.pdfIn PDF document text
    • http://zuputes.atwebpages.com/38282020847.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/articles_of_association_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/steam_api_pes_2017_free.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_off0000d3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E0 5320 bytes
SHA-256: e2fbe188dcd065dc3c86040152fc168c849c83b04d903ca842c32b35122f270e
font_01_sfnt_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 10012 bytes
SHA-256: 70f4d628af5a0e5544a0f6fa7a6578d02045902214b6e6e76b67b8442c4c3940