Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79d7e4db559f225…

MALICIOUS

PDF

72.5 KB Created: 2021-01-27 23:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 39ff0d5a7324f8afe28165f17e51ffae SHA-1: 733f5a095286f3479c602b86bb539438c70506f9 SHA-256: f79d7e4db559f22517b7e260cf38e0aab27e69d38d4356b351bf6134698252ef
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/aws?utm_term=factory+reset+android+phone+broken+screen PDF link annotation
    • http://flowerport.store/wire_loss_calculator_dcromtx.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/dgcwbjf/mobile_dynamix_printershare.pdfIn PDF document text
    • http://comp-arenda.site/boas._io_snake_vs_city_apk2d88z.pdfIn PDF document text
    • http://comp-arenda.site/zombie_street_fighter_games7yk2h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454180/normal_5ff8118c2a7d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_5fe4e8d90955a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374956/normal_5fce16dd0a603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_5ffff75aa764b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457848/normal_5fe2edf91efc3.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/ihgdszZ/rugidaxazonupupoku.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/duzexefemosaxe/puwoboro.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/nemovenaseteduron.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/counter_strike_1._36.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/bacteriological_analytical_manual_of_us_fda.pdfIn PDF document text
    • http://pimubejat.epizy.com/immune_thrombocytopenic_purpura_guidelines_uk.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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 5392 bytes
SHA-256: 2e82226fef937075eb2e9c78cda8519b71ed31a43eaa3f60ff80ce924d4106ab
font_01_sfnt_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 10868 bytes
SHA-256: 495df1f7b10e64ec388a4f669beb03efdea3bbd8e0ef935283ad3ded19d059e1