Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7c689133bcdc23…

MALICIOUS

PDF

63.0 KB Created: 2021-02-20 12:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9819a2032b2fb91c4eda9786ec52289b SHA-1: 92ed2a86980f5ce6fc7291b212168b438463febd SHA-256: 0a7c689133bcdc23f339ee70008082244aaebe292f96aee856d751050fae3b9a
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://bologen.ru/wix?keyword=nihss+stroke+certification+answers+group+d PDF link annotation
    • https://cdn.sqhk.co/kogujipubap/if3yhhi/save_earth_pictures_for_drawing_competition.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/gfeDLgj/69671444436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485296/normal_5fdf62542f571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5fdc4519e7ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_602617bc85f97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_6007139e18cce.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/hZhhhpL/save_the_world_seesaw_locations.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/vesubodufisi/pufijaluvememokoziwikug.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/24698951937.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/diablo_2_sorc_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/dante_paradiso_canto_17_riassunto.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/call_blocker_application.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/bangladesh_taka_photo.pdfIn PDF document text
    • http://surubaf.epizy.com/simultaneous_equations_graphically_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/togoxewisa.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/917057414.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_off0000ba78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA78 5508 bytes
SHA-256: 9b9f69bf1370f5611e706b99d6e165dcf0d99e289b641523deac630eb3777909
font_01_sfnt_off0000cd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4D 9928 bytes
SHA-256: e56ea56657e7ed03221b24c4092015b5200d117d6dca2d398c42f1204c0ac78f