Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a82ff9eda30031…

MALICIOUS

PDF

72.4 KB Created: 2021-02-26 10:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 81bcf539b510b2125c1f6d5c8b94b423 SHA-1: 7eb43f06bbb095f114271061a9adf306a6416fcd SHA-256: d5a82ff9eda30031950c7fc1c02e5435a7e14c7d0f79c19dd9ebce610d7e7207
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://baarspo.ru/wix?keyword=biomedical+engineering+fundamentals+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474759/normal_5fd6d09d224d3.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/vYvjjjd/43985440821.pdfIn PDF document text
    • http://fc-aromat.ru/zudujifufaxivewovujipeno1ow.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/hggmgiQ/17160283414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_5fda3a02e9063.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/ihYEZgj/55822069838.pdfIn PDF document text
    • http://habirovradik.ru/how_to_reset_liftmaster_myqjk0p1.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/j1Hhd6N/lezuwukar.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/LhhmOVs/nonawosorexonemiwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5feb862abd577.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/mgeYafu/mumuda.pdfIn PDF document text
    • https://cdn.sqhk.co/puberufibo/0btZ3B7/outdoor_cat_tree_for_sale.pdfIn PDF document text
    • http://trokot-roznica.xyz/merejuofo5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467287/normal_5fcf3d9044a3f.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/djj4ibA/heroes_vs_monsters_ios_11_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/biijiif/47259044675.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/bjeCtji/11012365825.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/cidSVif/limigizekaverum.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/LGsijbB/43269076525.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/d23gQCQ/50684482354.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/hdTJBid/43171886718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 5524 bytes
SHA-256: 2b47b5776d3f37c9c458282d1210362e907cb993c068000a6975952f3b31deed
font_01_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 10196 bytes
SHA-256: 00861f0f70ad65b773fb06b3d16328449739f3d5037c5ae56ad8dc92c7dd221d