Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66777d939f652f9…

MALICIOUS

PDF

68.8 KB Created: 2021-02-22 02:20:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 85f3f9f72cfafb3de24a0820e4b63e30 SHA-1: 49df65ff9fd5999fae80728f18c5fd786b4ad9c0 SHA-256: b66777d939f652f9e5c483eaf5d4e33e401acbe470d3874962eaac7f06a70145
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=manchester+high+school+football PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473971/normal_603264ba63f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_602c0b7c3e8b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_601dd9e82f63b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5fc9f23f3b35f.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/jiguxubizepime-mobafokuxal-zunikugikovixi-lojelas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_60306454bd2e9.pdfIn PDF document text
    • https://feroraja.weebly.com/uploads/1/3/0/9/130969346/7030538.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5fed1935913d6.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/ieHdNN3/dijovuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_60119fad90229.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/7hjSif1/79731677432.pdfIn PDF document text
    • https://luvunamuzem.weebly.com/uploads/1/3/0/8/130874488/29ec3.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/jivuxo/format_html_code_sublime_text_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/interview_questions_and_answers_for_biomedical_engineers.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/61662643782.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/73196792064.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_off0000d15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15D 5288 bytes
SHA-256: 1352b3e2053d05e8d6450c3ea4777cbca39bd0d68e2f23a65704f84a8afa3e81
font_01_sfnt_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 10224 bytes
SHA-256: a58df0801017536786078ee444d48f9b551e58445165d30ffe79598cdf7c4f4d