Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf9bd85edc4fc82…

MALICIOUS

PDF

71.3 KB Created: 2021-03-01 13:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 02feb06d0d8639152153ec73e0b4f134 SHA-1: c35c97273047524f33807ea2939ac30b991cdf60 SHA-256: ecf9bd85edc4fc8234fbca296123b5f7414e5bb047f34dc19ed7946f0eef9759
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=caller+id+spoof+apk+download In PDF document text
    • http://budivev.scienceontheweb.net/7181622189.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/woodworking_for_dummies.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/daloni.pdfIn PDF document text
    • http://vivujivavo.iblogger.org/vukiteguvepibolamonog.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/tarot_card_combinations_reader_in_hindi.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/bhadra_lakshmi_stotram_lyrics_in_telugu.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/3388673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakosafejel.epizy.com/aarambam_movie_full_bgm.pdfIn PDF document text
    • http://latowetutut.epizy.com/bartleby_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/kugekiwulezujupedurisimuj.pdfIn PDF document text
    • http://varepekolati.rf.gd/69551939138.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/data_analysis_methods_for_qualitative_and_quantitative_research.pdfIn PDF document text
    • http://molegonemuk.rf.gd/varuwuvepububi.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_off0000daca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACA 5096 bytes
SHA-256: 23d0f3c038a1258b771969762f11477b20290e80d8c78163076f66984d538f49
font_01_sfnt_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 10532 bytes
SHA-256: 9405a8bc120b8c68c075d67558113eb59af4ce8a7dc77b402da06bbeb01d0e5c