Malicious PDF — malware analysis report

Static analysis result for SHA-256 95de611820e09f93…

MALICIOUS

PDF

76.0 KB Created: 2021-02-23 12:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 29b067d7bed88188c7117e3b95d2c1dd SHA-1: bb4d46746c3cc206230570ae4349f3d115d81a50 SHA-256: 95de611820e09f932b58ecec48996f88e7d8806f699dddf58923d5408e5da61a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF_SEO_LINK_FARM heuristic. One of these links, https://leonvi.ru/123?utm_term=winchester+model+94ae+xtr, is directly embedded. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution.

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
  • 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://leonvi.ru/123?utm_term=winchester+model+94ae+xtr PDF link annotation
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/barizixalidifo.pdfIn PDF document text
    • http://alsamcctv.com/oratory_speech_formatkt4qx.pdfIn PDF document text
    • http://swiss-gear-top.xyz/best_pressure_washer_attachment_for_drivewayac5vu.pdfIn PDF document text
    • http://frankiearvelo.com/pollo_loco_chicken_bowl_caloriesqjqvo.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/falejogajir/fly_fishing_report_delaware_river.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/chm_to_software.pdfIn PDF document text
    • http://nomekerileme.epizy.com/nirawor.pdfIn PDF document text
    • http://gibopaxoga.epizy.com/vepinale.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/noxovinuvixalulofelowugi.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/28945011951.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/colosseum_with_audio_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/hemoglobin_c_disease_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/problem_solving_worksheets_for_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/free_cv_template_word_for_fresh_graduate.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/top_10_role_playing_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/kojopebowe.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/jilifekoxer.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/teaching_evaluation_form.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA92 5504 bytes
SHA-256: 4cffe21dd7efcb84ea89e7ca542d6c1500867d50291b8d334d14ae01402214a8
font_01_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 11060 bytes
SHA-256: 5333e246c895caf4819cadde9384e24f4907ed896a8e15e6fd33c6a4a50c364f

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