Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7e80acf91a2698…

MALICIOUS

PDF

64.8 KB Created: 2021-02-13 12:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0abede262fbc848a6eee7e37591d8c77 SHA-1: f5d03112d1417fcb620a44f47831bbad833ce94c SHA-256: ad7e80acf91a269843aa15bc43dbd3fbf98dd5a0b249f85ba79fec2fbd583707
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://maypoin.ru/wix?keyword=chemistry+chapter+8+section+2+review+answers PDF link annotation
    • http://sazaleve.22web.org/cronotropismo_e_inotropismo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fe7d18315311.pdfIn PDF document text
    • http://cz-nitrof.website/fozidibumakuzonobapifaxo5r1m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_5fee37ad2f223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408588/normal_5ffd65a54e09a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_5fc82ac4b6fdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5ffa970c02182.pdfIn PDF document text
    • http://zahlungsservice-ch.site/gawilajurapvbbuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5fe64bfb0dd9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tinatuvarisofat.epizy.com/basic_electrical_engineering_by_bl_theraja.pdfIn PDF document text
    • http://mufunalera.rf.gd/90655333104.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_off0000bf9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9D 5624 bytes
SHA-256: 1fd699e14ea271a0ef84501e570bcfc550a0e08a1589c3d02f3ff2107f27251b
font_01_sfnt_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 10516 bytes
SHA-256: f079ec67a6f8807b1ebb47a4103a3d3533e690b75879c126a60f9f9c7525b6e8

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