Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3459e49043ab12…

MALICIOUS

PDF

64.8 KB Created: 2021-02-24 17:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4ab50ddc04e722b6409803c99c006aab SHA-1: 531ad199f279faee646fd3535574944a9952e79c SHA-256: 2a3459e49043ab127a9853c3f338cb89361ccbe725afe0f29274fce831c69521
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://crophysi.ru/wb?keyword=what%20is%20the%20weight%20limit%20for%20infant%20car%20seat In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486984/normal_5fe114dbbfa82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369174/normal_5fcf2fc5cf229.pdfIn PDF document text
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/2f033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_6035a12d836ed.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/0jqFvFO/divebodetozonimapafibekew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_602c7e2a57fe8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5ff4c41b52e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jhS0jbk/87703105731.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/56735708766.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/betirafipifid_baxetegel_diwilapoga_porabi.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/simple_python_programming_questions_for_interview.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/gomakobez/netacad_itn_chapter_9_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/mikuni_cv_carburetor_tuning_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/11314284617.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/65400567122.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_off0000c228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC228 5400 bytes
SHA-256: d82f6ca4cbc25ef46d23722a6c0a89836c469c8ad9eb8e1dc178528eceff4978
font_01_sfnt_off0000d479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD479 9928 bytes
SHA-256: 8f352042a0be32a136c3d76dea2e13fbc135291085461457b277798b34bc4ff9