Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ccc56ac31a9a9a…

MALICIOUS

PDF

84.3 KB Created: 2021-03-29 08:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f016f6fab82bcce99a5c37b29c1e7e8a SHA-1: 556e0132586e0b69f849944e4317cc2a04935f1d SHA-256: b8ccc56ac31a9a9a14323ec00d14c3bebe8c53daec646e381de440ed0ff6db7a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=savannah+tv+listings PDF link annotation
    • http://fulukegoror.getenjoyment.net/49095515621.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/ieijife/memegixumebiberuzegoduf.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/how_to_adjust_pumptrol_pressure_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/ggfgkig/38411841508.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/YYjaxgg/58258433225.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/ronenitevodo/23422838154.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/51079040047.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/26184339902.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/hud_annual_action_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/is_flat_stomach_tea_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/xawuz.pdfIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/all_symbol_name_in_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/honda_3000_psi_pressure_washer_replacement_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/cima_f2_advanced_financial_reporting.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/snake_game_c_code.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_406be84a43b94fe19c180034db7fdb99.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_11b4809943f942d5a38d75b6e04caaf8.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_a53fd34d748947fda2d7b9881fcd940f.pdf?index=trueIn 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_off00010e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 5016 bytes
SHA-256: e9686308d6c5a76145b046d9ca5b0246a57cfe7c8dd561cae8b996ae0ed60ab8
font_01_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 10896 bytes
SHA-256: 46ff064072e0dac9a6724ac07e73d8dde54a75266685642fb60466d273466a03

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