Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef64f80ce8b2cea3…

MALICIOUS

PDF

74.9 KB Created: 2021-04-06 17:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 04527b2c3637ba26d12055b86d649d2e SHA-1: 7331f61c411c97b6d488cd4e1678f0e63f6655b8 SHA-256: ef64f80ce8b2cea38c137f285528dba8a120a63159d2343fff9720a3eb8c33f7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a URL that appears to be a phishing lure related to a printer model. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://soxebez.ru/strik?utm_term=officejet+pro+8600+premium+e-all-in-one PDF link annotation
    • http://vegofejolafud.mygamesonline.org/bohemian_rhapsody_piano_solo_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/rMiijig/bella_vista_golf_course.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/past_simple_story_2.pdfIn PDF document text
    • http://zudepogumo.medianewsonline.com/ashland_oregon_map.pdfIn PDF document text
    • https://cdn.sqhk.co/bexikerez/FGF6ghi/vaxubiridexiguzetab.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/roxedigip.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/baybayin_history.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/giidBij/la_recia_norteno_banda.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/luzorotefisetevobana.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/90458298004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://betakudo.atwebpages.com/9631295743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8053cf9-bdad-4f9a-9c61-84438474cf59/naxujan.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/54613538536.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/43926218639.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/67105166191.pdfIn PDF document text
    • http://jojulupijawide.onlinewebshop.net/76786816553.pdfIn PDF document text
    • http://xenexafa.myartsonline.com/22660206746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769ca7b3-fa21-4c25-a92d-f245656ecafd/white_christmas_movie_cast.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_off0000e4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CF 5608 bytes
SHA-256: c9e6b6aa75a338cc2f0715595380447ee86dad62756b4332d5d206e509024898
font_01_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 11296 bytes
SHA-256: ac521e2413898fc61ccc1332f3edd411842c8610e236f36a33e131a0e33e535f

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