Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d791d13c9cb0ee…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 09:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ea031506918b7c5de5b8d8791182736f SHA-1: 4617f09e118ab25a9c335dee47b32f2b07ca258b SHA-256: 52d791d13c9cb0eef14c0fee8a19244638c00803e7ea06a24fda217f2d0ddd17
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=bright+line+eating+vegan+food+plan PDF link annotation
    • http://ninozefumuwu.iblogger.org/english_test_and_answers.pdfIn PDF document text
    • http://mozuganimaf.66ghz.com/57498105950.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/what_are_jobs_daughters_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_603b5bb82312a.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/jajoxulabojaso/godavevamumekatafujag.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/tamil_melody_hd_audio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/17728680039.pdfIn PDF document text
    • http://jofewizabo.rf.gd/vedabagixo.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/89816725488.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/formato_de_nmina_en_excel_para_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/happy_birthday_name_cake_image.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/74781083817.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/best_mediterranean_diet_app_2020.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_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 5232 bytes
SHA-256: 4f89826a52134159827ce8c09739929c8a843e0c6cfeea8397b5da68219a77f9
font_01_sfnt_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 10768 bytes
SHA-256: fb2797ab73c99bd869d0fb8a16348c1f3ac41bb36181b90f1fbe9916b0c38a22