Malicious PDF — malware analysis report

Static analysis result for SHA-256 5531ec2206f64262…

MALICIOUS

PDF

67.6 KB Created: 2020-12-30 15:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8aa5791a094975c4cfb85bea63aba612 SHA-1: 3f211ae565d3b3426152548895dbda53452978a1 SHA-256: 5531ec2206f642628ba748b6efac953b919d1580f837c035515fe8194cfacab6
194 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
  • 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://traffine.ru/wb?keyword=loopy%20looper%202020%20results In PDF document text
    • https://cdn.sqhk.co/filumabit/jeiaS3Z/business_analysis_tools_in_excel.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/7728887.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/igidJMN/7650890001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_5fb60a368e52e.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/igjjV6F/wuxujufonaxezesefizawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fab560d9675a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420245/normal_5fc92f465fc3a.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/d7vheqs/xaxomogapuwokaverawo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf237db-edda-45be-9850-87ce603cd52a/borutidinajezurekela.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/eureka_pyros_logograms_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59e8867-dab0-45bf-8607-2774e8a64959/beer_shelf_life_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906f9583-9bfe-480e-9214-92eaa7ba24a6/cataclysm_enchanting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd04f725-eea6-41b6-9848-16194ee53a29/48084301691.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/multiplying_two_binomials_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b11f5e-b95f-4e1a-b9be-d00e33d012a9/rockstar_movie_download_720p.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_off0000cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0F 4920 bytes
SHA-256: 9bfc8c1bc53bbb5b19d3020a8b5719bbcb361a3f63b0110a2de8dff72fbc01c0
font_01_sfnt_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 11124 bytes
SHA-256: c8585d86910026319b8787e71d39c896bb1afc0889151f859d2953b76e106039

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