Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c84a3532b449b56…

MALICIOUS

PDF

76.4 KB Created: 2021-02-13 17:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b11f843049afafc88d05ff148b4a456e SHA-1: 02672d980c8bfdd3ea18208e6ea83c1903295e0d SHA-256: 8c84a3532b449b566f8e706d93346258d6438a4d6b426c837f3b8c3a5115768e
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://crophysi.ru/aws?utm_term=developer+tools+android+emulator In PDF document text
    • https://static.s123-cdn-static.com/uploads/4464709/normal_5fe1b311f3b09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5fec22952565e.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/41371845097jtk9v.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/YhbWT6G/93585658895.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/ajjojjq/epic_games_stock_price_graph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_601183a660817.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/Lhjiiii/rarity_definition_literature.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/tupofelasujewas/carprog_v4._74.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/66921978364.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/poweredge_m830_blade_server_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/black_clover_episodenguide_filler.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/51438947443.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/miputusiteredifelodupodu.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/identificacion_de_enterobacterias.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/rezulovakime.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_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 5164 bytes
SHA-256: 5c1265e470a98d5d23e8b4a355d176d624ae26d60d056d12cb61a44feed97f19
font_01_sfnt_off0000fc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 11800 bytes
SHA-256: 6f2e9d54c13587f09b25002f74b04bec7d0d1dc0b75947d54822e637708a7086