Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efea1f38a6990f2…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 04:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bb3cc70dceed50421aff362986b0e411 SHA-1: fbd2776682823e5eed82c383d6f751eead07c8d6 SHA-256: 9efea1f38a6990f2eb67e4266991984c05961c2e03e051d41584e10331662ff9
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/wb?keyword=mathematics%20of%20finance%20eighth%20edition%20pdf In PDF document text
    • https://cdn.sqhk.co/kerametunal/ghgJhgH/mogikumab.pdfIn PDF document text
    • https://cdn.sqhk.co/vasavubedo/9iag5ge/kovuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/bibihjg/lynx_like_cat_breed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_60053179889b3.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/buhawgj/vananupetosat.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/j9fhamW/free_hd_movies_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/0qryjcB/simedojeraretudesapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454162/normal_5fff98feb76fb.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/bJggiyF/surviving_titan_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/Ihjibhc/one_night_ultimate_werewolf_app_options.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/m9hfgjN/wwe_raw_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/OLSgdhh/horror_in_the_pink_house_escape_adventure_walkthrough.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/rurosaveruk/stem_cell_reports_impact.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/basics_of_automobile_engineering_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/mandrill_default_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/fosive.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/google_data_studio_report_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/bipuseruvasumapubepose.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_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 5444 bytes
SHA-256: d4df53c093b9f6ac44401d538b5f71f7cc03320f97dbdea674810c328f9d8a99
font_01_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 11624 bytes
SHA-256: db0e43838855025ead9b2f800bf376b187d8b584540153d3ad590b8618a64a63