Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfca739f10566ac…

MALICIOUS

PDF

75.1 KB Created: 2021-02-21 16:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bf795ba4acb1f0000611adf2bbcce0c1 SHA-1: 9ec7466e91f5b46ece94c510fdae30af7cef7969 SHA-256: 8cfca739f10566ac1e4644ac8554e0effbd97592a2a615e5d525c7c8c128dc5e
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://maypoin.ru/wb?keyword=schlage%20electronic%20door%20lock%20reset PDF link annotation
    • https://cdn.sqhk.co/tejilunuf/iK28hiE/hotstepper_lyrics_bexey.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/paBgdgi/nail_art_kit_shop_in_mumbai.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/8ZMNbbK/my_best_talking_parrot.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/cVhgic1/war_of_the_west_2019_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/hhDqNgg/61760793301.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/fjeXhaE/dan_the_man_hack_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fd68521a55b1.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/cjjydS7/47464922275.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/taturi/html_attribute_date_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/esma_guidelines_on_suitability_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/28716776343.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/symbol_android_scanner.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/android_app_support_pc_software.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/physics_laboratory_manual_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/bridlington_school_uniform.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_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 5368 bytes
SHA-256: 3b96d3c7785e0b4b2ee221cd51f42fe874b213581f199529883157067dd4be56
font_01_sfnt_off0000fb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 10668 bytes
SHA-256: 579ff1a1a402f3aa905bbd4cb4e3feccc06894b218260c07d5d1d78a40c3b3e8