Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfea3f90d275e218…

MALICIOUS

PDF

73.5 KB Created: 2021-02-11 14:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6ef14d3fced16d36d7f986874f406bbe SHA-1: 763011d397ba5d182d26be75e170afb7327fe447 SHA-256: cfea3f90d275e2189777db925efd6f202c7608bee173bc1308eab7320a44f716
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/123?utm_term=the+bourne+identity+pdf PDF link annotation
    • https://cdn.sqhk.co/kaxovugefulo/igiEiiD/how_to_plant_cosmos_flower_animal_crossing.pdfIn PDF document text
    • http://steelsho1.club/zozupunifivogiguvajafiz6ni7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_5fe81ab04dca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_6016d472b90c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_60029a9cf1b36.pdfIn PDF document text
    • https://cdn.sqhk.co/gemesikexo/a8RhhJW/futofojox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5ff66b5063e3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5fc7c74e8557c.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/rigElhi/cash_day_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/esaJkC1/66631346299.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/cRHidOv/turbo_trainers_sydney.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jgBjd5q/50244064876.pdfIn PDF document text
    • http://nextauto02.ru/67996773042rl116.pdfIn PDF document text
    • http://smartcoin.design/refesurepadoxet82o9.pdfIn PDF document text
    • http://shtancircul.site/nakurukokabutwlri.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_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 4900 bytes
SHA-256: a5a28fe1e3ff4dc7a5aa479652791363d7b47fcf01d860f42ff7caab0bafe1b5
font_01_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 10484 bytes
SHA-256: fab8ca3550d9ed1b0964fdc5aa089a13df6f53f86f3c11da601eadd5176c204e