Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf0a06212cbb971…

MALICIOUS

PDF

71.2 KB Created: 2021-04-10 02:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bd949a4bac2434b5ef03ec8067de960e SHA-1: dd264ab43717f01214e69e7c98d0e051969e0476 SHA-256: ebf0a06212cbb971766077dc8f44f50d9e87a1cad415d66ac0c48ec4f85a61cb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://midufefew.ru/strik?utm_term=dunkin+pumpkin+iced+coffee+ingredients PDF link annotation
    • http://jalojewaga.mypressonline.com/36611963668.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/analogies_reasoning.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/YerZbwz/xitadinem.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/solve_quadratic_equations_by_factoring_ppt0x2mj.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/ghjg3Sn/afterburner_oc_scanner_missing.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/36551956843.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/konijudawuluwemoluwowil.pdfIn PDF document text
    • http://bolawixefop.mygamesonline.org/thomas_calculus_early_transcendentals_14th_edition_solution_manual.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_to_start_internal_audit_of_a_company.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/math_worksheets_for_2nd_grade_with_answer_key.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/certificado_medico.pdfIn PDF document text
    • https://cdn.sqhk.co/texivewa/eLig3qQ/47044504625.pdfIn PDF document text
    • http://indital.fun/23741472875wkevn.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/hhPahct/29763358994.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1d78cdce-0032-4a75-b9f1-030f6b068c24.filesusr.com/ugd/32f660_8ec64dc210284aa5b01aab14316eb0ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/dukajilosirokifipomufife.pdfIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_6d512754b80c411da4ee0245f7b92710.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/android_lifecycle_example.pdfIn PDF document text
    • http://xejobutek.onlinewebshop.net/27045769171.pdfIn PDF document text
    • https://72be5e1b-4d14-4335-96ee-88463f604c48.filesusr.com/ugd/57ecfe_ca5518ea114d4c2394988430920c708d.pdf?index=trueIn PDF document text
    • https://e7e1611e-f78d-4dfd-b5ce-3be5f579732f.filesusr.com/ugd/4b76a6_ae53b5fa28d54281891ada30d3b7bf21.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_da7875b0289745f49c72963db5f91b2a.pdf?index=trueIn 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_off0000d660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD660 5296 bytes
SHA-256: ccbd40679ad9c8862ce90aceeb83f9b146fe16f0ae58de2988d8e8b7c43c63ef
font_01_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 10984 bytes
SHA-256: fd7398a3ff9020b7b8b82c0a210cfdd4cfeffa6c9690349f786efa8cb6cbcaa6

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