Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c42af3a5115c28a…

MALICIOUS

PDF

69.3 KB Created: 2021-02-16 00:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78eadc249c023ac1478a4cbb90f7c3fe SHA-1: a1ee7ccfa81ea2724b0c3cc3310e1922f94ecbb2 SHA-256: 6c42af3a5115c28a2bf801b5642f8c71c2c0b71a3f7c7736cad79c749075e216
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://baarspo.ru/wix?keyword=geometry+translations+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480174/normal_5fd1cd059f0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_6025a17720d27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488810/normal_5fc8456aeed68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489838/normal_6012a17984a6d.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/gdKjC2m/free_pc_games_not_on_steam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5fe9ef965fac9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_6001d05610d4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5feb96ae66120.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/ijhcge4/filowijifajajijukasekodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_601cd30c839b3.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/ieufjfc/37973779907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_5fff7f30eda8b.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/chaPsjd/98930497973.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/mixanaz/letter_images_free_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/meet_synonym_informal.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_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 5212 bytes
SHA-256: e9cb192c7a490eef202027fe7a980f924c50e988be89d48aff19541c584d8e76
font_01_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 10364 bytes
SHA-256: 1e8f8757d9d108cfbd02711764bb199dde0eeb75f09e5ebcd9fe121dfdab5af9