Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e647f5e09d7c26…

MALICIOUS

PDF

82.9 KB Created: 2021-05-17 07:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cd0147919cc714be080c5830a94eed5a SHA-1: 9ccf581d18fb46d9296f4065431ad2b4f11fad82 SHA-256: a6e647f5e09d7c266111684601456b4bf9adbbdb7dfd12597a2f7a614f92a6a3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware delivery attempt. The document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into downloading or visiting malicious sites.

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 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://kuzutuzo.ru/strik?utm_term=what+are+the+principles+of+cognitive+psychology PDF link annotation
    • http://zomixuxoluzijum.mywebcommunity.org/free_download_holy_bible_niv.pdfIn PDF document text
    • https://jobeluke.weebly.com/uploads/1/3/5/3/135318189/0c5d93319056af.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/tratamiento_para_gastritis_aguda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_606a3253a6efd.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/62234054637.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/learn_japanese_file.pdfIn PDF document text
    • https://sewogasi.weebly.com/uploads/1/3/1/1/131163712/6928347bc51.pdfIn PDF document text
    • http://mejuzuw.scienceontheweb.net/peabody_s_pipeline_corrosion_and_cathodic_protection.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/morgan_anesthesia_book.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/14792498937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_603edbe374448.pdfIn PDF document text
    • http://lugabev.mygamesonline.org/zevuvaxonebudemaxeget.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/cricket_score_sheet_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454304/normal_6056fd6ebbb88.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/tuxal.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/d2de14737eca.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/amway_products_catalogue_download.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/declarao_nostra_aetate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_5ffcb652e9b14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natizuf.onlinewebshop.net/karl_marx_conflict_theory_essays.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/9845921997.pdfIn PDF document text
    • http://fazobelo.onlinewebshop.net/pdf_to_word_converter_apk_for_android.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/vocabulary_words_for_ielts_writing_task_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/19513089675.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/water_filtration_experiment_worksheet.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_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 5452 bytes
SHA-256: 513f1a6fd003aa8ec6b63382070ea6cb5f11d5fa31ad1db9d3c73734bb051b42
font_01_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 11680 bytes
SHA-256: 86f724daa20a10134f74acb0e3c00feef34349872ad74304df3311d1d3c3235e

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