Malicious PDF — malware analysis report

Static analysis result for SHA-256 b489717ab73a85ae…

MALICIOUS

PDF

69.0 KB Created: 2021-02-11 18:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 38d34f55e85d8ec6587ed33e2eaf86e1 SHA-1: 01ea76ba4e2d5c8376312729a25c431ecb575fbe SHA-256: b489717ab73a85ae77f32c94f611a5ca7dc2034b3562814502e6add4fe57117a
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://jacksth.ru/123?utm_term=fifth+grade+commencement+speech PDF link annotation
    • https://cdn.sqhk.co/kigaratak/ijbhdgg/shogun_express_owensboro.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/iggiQZC/mofulolitapipelidukoga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_600737960a07b.pdfIn PDF document text
    • http://makedctl.site/91566868490mf9dt.pdfIn PDF document text
    • http://100naturals.fun/undertale_megalovania_piano_sheet_music_easyc05sl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5fc5a06e91e3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fc7aa9909363.pdfIn PDF document text
    • http://connexion-amelii.xyz/narrative_and_expository_text_worksheetsb82xl.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/Xb8Ldhg/69279266616.pdfIn PDF document text
    • http://bobr.space/tupler_technique_exercisesqoxfo.pdfIn PDF document text
    • http://biomanua.website/823804729614f63f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481847/normal_5fc9c3af3003c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fff4e57cb962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_6009e82377913.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/NAuoAgf/37856152586.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/ratixifo/kitixipobavumuba.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/jodukibusagovaga.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/nanexakido.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_off0000d047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 5492 bytes
SHA-256: 25e32c486c840ca908a5013abc967fdc2d66e18546a41e27b177fced02396391
font_01_sfnt_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 10508 bytes
SHA-256: 3d90d6cfec4fc59bf2a3b113dea13cf08b65cfcb831a8ecbf1392da340168c9c