Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86aa3159754a912…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 01:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7cb6bd749d2f083f6a808529bbbb7586 SHA-1: 95988a999c4405843a8c5454ac4c103e264ca58a SHA-256: a86aa3159754a9129bbd519d16250fad956a89ce7ddf90c032703fd9bdf14cf1
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+to+repair+brain+nerve+damage PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465252/normal_6015d4f6ba058.pdfIn PDF document text
    • http://study-english-02.space/nisupunetuduzoboz7w7h8.pdfIn PDF document text
    • http://ital-tess.space/introduction_to_biotechnology_third_editionmojgo.pdfIn PDF document text
    • http://discovljzg.fun/vufututolugisovikinepumwv9.pdfIn PDF document text
    • http://serusidam.iblogger.org/33612679237.pdfIn PDF document text
    • http://site-shop.xyz/momeji3xut0.pdfIn PDF document text
    • http://recepty-dd.info/sigagigosanunavopik9hmh.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/nisoxow/verbos_en_ingles_presente_y_pasado_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/dead_cells_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/ary_news_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/81986255845.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/89338084104.pdfIn PDF document text
    • http://zaneliza.rf.gd/itinerary_template_for_uk_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/1761993549.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/data_analysis_fundamentals_using_excel.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_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 5320 bytes
SHA-256: 24cd673e2b92c892a3521526ee0ebf38f06433a822f1e92f860e915ebc977689
font_01_sfnt_off0000f4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 12040 bytes
SHA-256: bccaa8818aae31b574827c08e4722dfce97a994b9845f89d6f01b3ff2601b889