Malicious PDF — malware analysis report

Static analysis result for SHA-256 85eeb17d8793a2db…

MALICIOUS

PDF

74.1 KB Created: 2021-05-01 03:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 17605f4ff6cc54c961af6996ef792421 SHA-1: a873a142ba6079c73df135e5e074d0d32219aef4 SHA-256: 85eeb17d8793a2db77bd22c43dc49d6ddda0b42384d1e15bd648499b9065be83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for distributing further malware or leading users to phishing sites. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/strik?utm_term=camera+lucida+drawing+tool+youtube PDF link annotation
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/6840799.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/MvhfgeW/gukupor.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/eUKQajb/vuxilubogo.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/Y5ehfYl/tenupiluj.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/jcaijja/hotstepper_song_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/hha27Z5/outdoor_survival_skills_course.pdfIn PDF document text
    • https://buvewetaki.weebly.com/uploads/1/3/0/7/130775635/zijededimok-zajuj-novineremowijof-tezol.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/kugumajaga_soxage_korujo_dubuja.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/igjjNdm/ischaemic_colitis_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/cNZnCVb/idle_universe_best_upgrades.pdfIn PDF document text
    • https://werikaduf.weebly.com/uploads/1/3/4/4/134483952/lisug_rikasexopen_kibepokig_kixizano.pdfIn PDF document text
    • https://cdn.sqhk.co/nudabesawi/ac0jcja/soriputuzaduromumapof.pdfIn PDF document text
    • https://cdn.sqhk.co/muzipajat/hifchbN/80465527826.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/tajimipojimo/wasubimivevojepixasibik.pdfIn PDF document text
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_2d3013fa245a4a7f99a5db2429360fcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/gudiya_rani_bitiya_rani_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/escape_room_50_level_11_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/blood_donor_healthcheck_form.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/cost_budget_estimate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/98055296162.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/warehouse_kpi_dashboard_excel_template_free.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_aa64fbaa7442411a8adedd0db11a2aa0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/didotokovu.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/nikon_p223_scope_for_sale.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_off0000e226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 5320 bytes
SHA-256: 5d6cea0fcb4eab04dd524e7a71c6d2a7c6aebd558521dee0b75b24320553fb34
font_01_sfnt_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 10676 bytes
SHA-256: 1740a4e9b18a1922ceb49f69d99e103e018ed3df6c2696588406f2e6b3604fee

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