Malicious PDF — malware analysis report

Static analysis result for SHA-256 220a3767e1744473…

MALICIOUS

PDF

68.1 KB Created: 2021-02-15 19:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 71cf66956810f6707ee81786ace5201a SHA-1: d0adc767003e60574f80513b8023f7717c30cfb5 SHA-256: 220a3767e1744473cc34174f8b805fd434c8307cbf1a961539060e3fb37949f1
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=what+is+lsu+football+schedule+for+2020 In PDF document text
    • http://com-signto2.xyz/office_delve_for_office_365_admin_centerfncnf.pdfIn PDF document text
    • http://itdiscount.info/tevopibapigalibomuvp0dqd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5fcc13496566b.pdfIn PDF document text
    • http://italia-doc.fun/nugelekhh5j3.pdfIn PDF document text
    • https://digikugububim.weebly.com/uploads/1/3/0/7/130774990/judavuk.pdfIn PDF document text
    • http://beremoter.online/jirubiz6nzhf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5ffc33942ada1.pdfIn PDF document text
    • http://blekrossi.ru/beach_head_2_game_freek72q1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_5ff88719b5c82.pdfIn PDF document text
    • http://qrastenmap.online/tv_guide_tulsa_antenna1dyr3.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/4N9iaji/coloring_of_five_nights_books_suitable_age.pdfIn PDF document text
    • http://ledy66.net/jll_egypt_report_2018f2sog.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/bofake/lewumuxowurudeda.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/3242257290.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/30464819491.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_off0000cbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFA 5536 bytes
SHA-256: f003d9f959cd2ec14e9e60b7ad01ba9a434d6ecf30501ba4c84801f72a764867
font_01_sfnt_off0000decd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECD 10808 bytes
SHA-256: 1e6a06e8bc8ebe2fb56b1f6d8740b431d56cfbb98615520f633749f39ea49726