Malicious PDF — malware analysis report

Static analysis result for SHA-256 f740ff9108db3ed7…

MALICIOUS

PDF

67.9 KB Created: 2021-03-03 19:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9452d0cd59a419c388b18e4bd9fcf568 SHA-1: fb62152cd1a537be9e0a5d7c35ecfd330dc7099e SHA-256: f740ff9108db3ed7da9b0b66acf8efbb7fa70164d1777b419e204172a3d1009d
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://jottigo.ru/wix?keyword=things+that+start+with+he PDF link annotation
    • http://nipawifaxupus.mygamesonline.org/korean_alphabet_chart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448750/normal_5ff5b8965fef2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421214/normal_5ffa18fd34dd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_6039aaafaba8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448976/normal_60020fe8981f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fda040be798a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/1794-aentr_add_on_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/78855236969.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/xarafaso.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/genie_h6000a_carriage.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/kedov.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/cctv_camera_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/plataforma_streaming_da_disney.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_off0000cdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBC 4956 bytes
SHA-256: 276fb92c3b15559119ef409a449d3bd737afd5e99984d1aaf1bf37344f4c35aa
font_01_sfnt_off0000dea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA8 10240 bytes
SHA-256: b89cd5cd75fdc68310aa8c3591d977bde5acdad6a394dfa56453b86c8a0b2c6d