Malicious PDF — malware analysis report

Static analysis result for SHA-256 433b6c7c3829a818…

MALICIOUS

PDF

76.8 KB Created: 2021-02-09 04:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 23eb2356e2970ea75611364d8656b557 SHA-1: 38064337206367f2dc51c7e10054055317b69ff0 SHA-256: 433b6c7c3829a81810c8d06a5d167d17f866cf6d448a6f6be9e699d72c1760a6
184 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.
  • 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://yafferge.ru/shook?utm_term=unterschied+whatsapp+business+und+whatsapp+business+api In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464315/normal_5fe8accccff75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_5fda15610a069.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/B4EJTha/73758912463.pdfIn PDF document text
    • http://tegogigagozij.iblogger.org/30780334624.pdfIn PDF document text
    • http://vovuzug.22web.org/video_lirik_lagu_peterpan_yang_terdalam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabunuwo.epizy.com/34913551582.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/cisco_meraki_systems_manager_ordering_guide.pdfIn PDF document text
    • http://xenemusexo.epizy.com/57094409014.pdfIn PDF document text
    • http://muwalolerede.epizy.com/83496828783.pdfIn PDF document text
    • http://wuzuvulas.epizy.com/firefox_60._4._0.pdfIn PDF document text
    • http://rigirulame.epizy.com/aminfluorid_chemische_formel.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/fewer_vs_less_worksheet.pdfIn PDF document text
    • http://mopezit.epizy.com/78563707600.pdfIn PDF document text
    • http://wirijabi.rf.gd/asuran_movie_theme_bgm_free.pdfIn PDF document text
    • http://segixiw.epizy.com/affordable_health_care_act_income_guidelines.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_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 5352 bytes
SHA-256: ac749d22d510793d2b9c678a92426dba8d5e619605182de1880b6dd4a797d155
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 11592 bytes
SHA-256: dcef40a0b44cbda4afa3dc9db33acc1055fd21b390a2d7c5c500820a6351537d