Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d58502a7a41a73…

MALICIOUS

PDF

74.6 KB Created: 2021-02-19 08:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 14bc366b5fd898a253f41bbd71246837 SHA-1: 85f6e64bc4d7d46144b188a52a18cdde05ef4f5b SHA-256: 66d58502a7a41a732df4c00a69caae830d7aab183034c15be1548645d78fee08
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=best+drawing+books+for+9+year+olds PDF link annotation
    • https://cdn.sqhk.co/jofijoju/j6Fzghv/19001059312.pdfIn PDF document text
    • http://erethiztzj.space/zusoposetoxa25h40.pdfIn PDF document text
    • http://trastqort.online/biology_corner_answers_key_epitheliais4fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_6008ac849db43.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/a9nged5/metal_slug_xbox_360.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/yr0ghig/stickman_ice_hockey.pdfIn PDF document text
    • https://cdn.sqhk.co/joninopi/jDxKXge/8926831092.pdfIn PDF document text
    • http://idclick.cash/repafebawinanekqs2rg.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/Khdgcgc/96124833662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5ffa8c0fc7ee0.pdfIn PDF document text
    • http://umdtheatre.ru/gabanosewivarimuwogisakieqhgn.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/gogoxowiniza/fantasy_football_cheat_sheets_yahoo.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/21428015873.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/xekabubez.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/research_paper_outline_template_google_docs.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_off0000e4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 5680 bytes
SHA-256: 63d6d07e0d695cce5ac74ea58c40864f19fa8a588bc747c5283814c56b99049c
font_01_sfnt_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 10876 bytes
SHA-256: 0053dd848991342c00f94f1349168936c414a9e6be84ec35d5809f913310311d