Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d76abf151fa1629…

MALICIOUS

PDF

46.9 KB Created: 2020-11-05 16:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 899bf5f32509270f5b906950e3105138 SHA-1: c69a09e4e20ee4a32585468389a13a72fb58bbf6 SHA-256: 1d76abf151fa1629572d7a1b36e4e4e45480815807d343e20984b38f3cf968e8
116 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://trafffi.ru/strik?keyword=vpn+free+download+for+chrome+os+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f9cacec70ab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f9eb220b6b13.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/vuzufexarevima/a_wrinkle_in_time_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/stl_to_3d_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/allen_bradley_powerflex_400_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/dazifenuxig.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/comptia_a_certification_study_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/83251213522.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/gazojevanepulerari.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/lg_escape_3_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/99967686317.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/98643633217.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/amazon_strategy_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/atv_snow_plow_guide_markers.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/vefodiwofovinipedit.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_off000077c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C5 5656 bytes
SHA-256: b06081b986ecf5cb51d57a47e589befc90f9cdb1a6354edfe69f456eb092ffd2
font_01_sfnt_off00008ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE9 10636 bytes
SHA-256: ac40adf65baeac7db08cec7937ee55df4507739dfb03d82de3f47ad39672857d