Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf471bb10b4d15e4…

MALICIOUS

PDF

66.5 KB Created: 2021-02-20 18:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b31060bce50507217fcf6ce341c324c5 SHA-1: d482b4bc95fb1f5f9200f96bdcf872654b9f0e3f SHA-256: bf471bb10b4d15e421b02558eea46838d827ee15cc55dff438c442dafb85e82d
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=glencoe+algebra+2+chapter+9+test+answers In PDF document text
    • http://leoidet.xyz/free_printable_blank_bingo_cards_templatejv53s.pdfIn PDF document text
    • http://obzorov.site/what_are_good_books_for_young_adults4wsvb.pdfIn PDF document text
    • http://fibakigefejep.66ghz.com/86248897142.pdfIn PDF document text
    • https://cdn.sqhk.co/kejopala/mhgmahh/xesaronuduboririrugimogax.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/rijigfo/chicken_poultry_farm_for_sale_in_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/gjqichb/mario_galaxy_stars_list.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/xifabilejilab/waduben.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/grammar_editing_practice_worksheets_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/28324257541.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/31398722441.pdfIn PDF document text
    • http://diwiludoki.rf.gd/75993181333.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/cdc_vis_flu_form.pdfIn PDF document text
    • http://zitejilid.epizy.com/how_many_lumens_is_a_million_candlepower.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/60443774404.pdfIn PDF document text
    • http://xovijoj.epizy.com/investment_appraisal_payback_worksheet.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_off0000c5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D0 5748 bytes
SHA-256: 8af5f5335c3e8d85e2444277d63df6754b458c36242fd8b2189afa65c1f6da39
font_01_sfnt_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 10516 bytes
SHA-256: bc68a5e04283ea66af0fff3ab8c24dc87d9c02ff9c086e31cccf5c3cfd6bc9bc