Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9d8a6068c45364…

MALICIOUS

PDF

63.5 KB Created: 2021-02-16 08:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 77a10f6383b6d9d8fbc1a6b65ec7df0a SHA-1: d0de01b8fb9abb7c302527117ff736d5a4f2d75f SHA-256: 4d9d8a6068c45364606e5fcce2ac2aa1a26fc8e674be45d193cad61131ccfe76
254 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
  • 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.
  • 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.
  • 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/wix?keyword=historic+magoffin+hall+el+paso+texas In PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/775fd75684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_6015cf7b48adb.pdfIn PDF document text
    • https://cdn.sqhk.co/juvokapo/INlherL/going_to_rain_tomorrow.pdfIn PDF document text
    • http://abzac.me/26756008793olwok.pdfIn PDF document text
    • https://dafizoxov.weebly.com/uploads/1/3/5/3/135309439/4189363.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/jdZhgiC/mtn_irancell_internet_packages.pdfIn PDF document text
    • http://matirimekege.22web.org/rockstar_movie_480p_300mb.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/LTijhbc/xavowu.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jdihjhi/10307104292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vovijez.epizy.com/wugodagub.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/best_android_phone_2018_under_500_dollars.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/brain_teasers_worksheet_4_answers.pdfIn PDF document text
    • http://dunoziboxisi.epizy.com/html5_css_portfolio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/guideline_hypertension_aha.pdfIn PDF document text
    • http://pexevogawi.epizy.com/map_of_europe_before_ww1_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/59930601444.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_off0000bc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6B 5456 bytes
SHA-256: 845c138abd5bde9d49a79731887d1b1f0b53560959272d649bb77fd496606c0a
font_01_sfnt_off0000ced7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 9984 bytes
SHA-256: 29597e635f2afe63dc361c3fa9ba79c4b6c0a7d2943a41ab57a44587e225d3db

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