Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e7c73b7cca54c9…

MALICIOUS

PDF

75.3 KB Created: 2021-02-22 00:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5a175d372b5bc06e78265236440b4986 SHA-1: cd0947525d1febf3111075c48d8dfaf4ca4b9bef SHA-256: 85e7c73b7cca54c97ffbe4a6ae162ddb9faaab54535973e2790c92eaf10ee202
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=is+lexus+gx+460+expensive+to+maintain In PDF document text
    • http://futegejetebe.22web.org/simomujusigowu.pdfIn PDF document text
    • http://gulidomirebo.22web.org/watch_free_movies_online_the_hunger_games_mockingjay_part_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5fda20234e98b.pdfIn PDF document text
    • http://webimedokawuxun.iblogger.org/kukuxifaruronoditajake.pdfIn PDF document text
    • http://sozetil.66ghz.com/bufif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fd8d97be3a11.pdfIn PDF document text
    • http://duxojiz.iblogger.org/jozumun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6011526ab7e79.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/lezopobigeza/jafilozamo.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/sheet_metal_forming_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/minority_report_filme_resenha.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/1336699420.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/bangladesh_railway_job_form.pdfIn PDF document text
    • http://melumudinev.epizy.com/women_s_saucony_guide_iso.pdfIn PDF document text
    • http://poweradufuxi.epizy.com/most_common_phrasal_verbs_english.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/boater_license_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/green_bay_10_day_weather_report.pdfIn PDF document text
    • http://zoratazux.epizy.com/20811170941.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_off0000e746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 5492 bytes
SHA-256: 4ea49ef478412a81c1c0fd1fe558c862a153e9262601a6668f5924c4b5088559
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 11652 bytes
SHA-256: 501232bb8afef8ff6ed46a3e61c5b2a9d91c9298cb5d998d4f8c5e727dcc5a9c