Malicious PDF — malware analysis report

Static analysis result for SHA-256 6473781a791dc651…

MALICIOUS

PDF

76.3 KB Created: 2021-02-12 01:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 68eb6f7a1967b0d9dc0b6a3877f77941 SHA-1: 50a57ad78991523bf875bd0c1842d811e8184955 SHA-256: 6473781a791dc65163a4ba37d7d1ae2822b77f25e133e9b4cc882f03c90984d2
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://yafferge.ru/123?utm_term=orchid+potting+mix+miracle+gro In PDF document text
    • http://degujub.iblogger.org/cours_gratuit_energie_renouvelable.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/Cy2ijjg/fewenoromowoxiro.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/fjf1YaL/19889400365.pdfIn PDF document text
    • http://tevopose.66ghz.com/501_critical_thinking_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/f5hjAhb/running_shoes_sale_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/hgLgghd/caponata_di_melanzane_ricetta_originale_siciliana.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/free_printable_thanksgiving_worksheets_for_preschoolers.pdfIn PDF document text
    • http://tefuzomabi.iblogger.org/52354092030.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ijQyR4M/susotalexixuwun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://risegofona.rf.gd/admission_form_of_sainik_school_goalpara.pdfIn PDF document text
    • http://pitupeg.epizy.com/ivy_global_sat_2_hr_diagnostic_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/kadubufinef.pdfIn PDF document text
    • http://jujizulafob.rf.gd/bluetooth_laptop_windows_7_free.pdfIn PDF document text
    • http://lorazak.epizy.com/birdbrain_robot_server_mac.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/puposaxe.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_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 5404 bytes
SHA-256: d111ac54ff0e7c7a7131dccb88840ea8aa63429264afc6fa4a191f3c17cdb538
font_01_sfnt_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 10776 bytes
SHA-256: 8b518d3e765de4caeaa5df8295c17ba095fba9606020f943b3435a4b06ca1581