Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03a86972dccf578…

MALICIOUS

PDF

71.4 KB Created: 2021-02-12 04:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f83dc1d198b6e444efc6fe0228f58d28 SHA-1: 0bc66f6612f0ff0dcabd2c8eb56b930660762899 SHA-256: b03a86972dccf5788a372c64be740bd75b7b331f0e6b674457e11d3112e390ce
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://bologen.ru/wix?keyword=bob+olson+book+answers+about+the+afterlife PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5fd3689e97bf5.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/4haNUjh/gedupivolinufujarukagages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5fe99086b9deb.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/angggi2/desmos_calculator_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_60186d627044c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_5fd38d23ea456.pdfIn PDF document text
    • http://claire-irk.ru/sodegefijyr7.pdfIn PDF document text
    • http://strahauto.website/news_reporter_killed_ukjhjf8.pdfIn PDF document text
    • http://rewita.fun/zogebowagamukimegope0jwsa.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/jjxKcgg/paponoximoremobuloma.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/heYTHgf/paper._io_2_private_server_name.pdfIn PDF document text
    • https://cdn.sqhk.co/lunilageruvu/ahfdrhb/zogonetefi.pdfIn PDF document text
    • https://cdn.sqhk.co/navolakolire/JONifgm/coloring_book_app_for_pc.pdfIn PDF document text
    • http://reduslim-italia.website/chemistry_book_class_11s8si7.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/temujonuwu/ics_file_format_specification.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/ragabonepexiv.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_off0000db89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB89 5200 bytes
SHA-256: b67d1d6a3d79ef8dc4148c72e598d1e8b4e914e7f3fe126e802055dd2cbfe7a1
font_01_sfnt_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 10136 bytes
SHA-256: 1c00fafbddc7fbd03b19e1bb7b87ce90cb469b34b63d2deab0300ffa5642f65a