Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9c5d145ca5433a…

MALICIOUS

PDF

78.5 KB Created: 2021-02-18 17:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f7718134335c5e14e0991238c650bd17 SHA-1: 494f2195b16c5273e5454aed7fe798166fffa146 SHA-256: 4c9c5d145ca5433a244f4f7c7d2f2b022265c9992a27ed6445ec4d57949fecab
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://baarspo.ru/wix?keyword=buying+a+house+with+mold+foreclosure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479235/normal_5fc71754b1805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_5fd64a6500ca4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5fc8fb80b0be7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_6027facd4ccd7.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/mhjggjc/the_communist_manifesto_book_pages.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386606/normal_5ff431a6ca7cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385004/normal_60085ab3af45c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_6003cf49dbdbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_60079c9b224d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5fda494ab2555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_602bb8af92186.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/ghgiTjd/shooting_kingston_jamaica.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476420/normal_5fced4c13c55d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5fcf604321b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_602895426951b.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/nufidibodudulad/acute_epiglottitis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/76023033395.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/ganiw.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_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5680 bytes
SHA-256: ad6836743bd1038fa35f54be218ed87626c7609e16bc75130575930d795bcdde
font_01_sfnt_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 10476 bytes
SHA-256: 7d8990612de6974743fb18b45f41b3a3805959425bb5d3bd1482efcee4368d8e