Malicious PDF — malware analysis report

Static analysis result for SHA-256 51804912c0f10135…

MALICIOUS

PDF

73.8 KB Created: 2021-03-03 06:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0e52e6fa0f74af69ed6353805b63fb3a SHA-1: 505900ea5899df3bdcb43ce808e7169a83b6b8f4 SHA-256: 51804912c0f10135cb951c6e612414a9a41dc01c9275aa500ade86af1ab5d280
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://jottigo.ru/123?utm_term=is+cyberpunk+coming+back+to+ps4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460266/normal_6032bb31436cf.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/HmKjjlI/subup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_601585a19d81a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485823/normal_5fef46e9076c1.pdfIn PDF document text
    • https://cdn.sqhk.co/ledivure/ij6l81Z/sibobixirujabereturi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372361/normal_5fc63befd4074.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/iijw8WP/the_complex_adventures_of_gumball.pdfIn PDF document text
    • https://cdn.sqhk.co/niporatibu/aHsjbjg/legoz.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/college_cookbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501810/normal_5fc72601510d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464319/normal_5fe7f66164c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460243/normal_601b507d630bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5ffc54056e42b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420924/normal_5fcda0c4c6a99.pdfIn PDF document text
    • http://djami.ru/birches_poem_analysisgyg0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE110 5552 bytes
SHA-256: 400b48b09c7512689f023b2749ad54b9e184e781cf12c5790f93d3e88c88eafe
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 11452 bytes
SHA-256: 6e76836ca354c19047cc077c7c9ce870ab40a2b2a741c184dc8c14f4e02fa107