Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc51cdd2c7e3f69b…

MALICIOUS

PDF

79.7 KB Created: 2021-04-23 22:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 29aa64f48555aa5e55e0f5e7965a3dd0 SHA-1: 46f36a0ff093c0192eb6efb08fcfe80c507d4fe5 SHA-256: bc51cdd2c7e3f69b188ea78709063947f782a99eb2e11ff5825ff02e06290a7c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to 'epson ex5220 wireless setup'. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites.

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 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://vilenefex.ru/strik?utm_term=epson+ex5220+wireless+setup PDF link annotation
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/3e8a7442c13b27.pdfIn PDF document text
    • http://nigasheff.xyz/46836505023b9xh0.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/dodogazetesumej.pdfIn PDF document text
    • http://goodshopsales.xyz/demunupitupariwavexdr37m.pdfIn PDF document text
    • http://tersq.space/properties_of_exponents_examplestayj8.pdfIn PDF document text
    • http://ritual-venki.online/59822460320gilis.pdfIn PDF document text
    • http://baltika-trans.ru/mortal_instruments_book_2_release_datexrj9u.pdfIn PDF document text
    • http://portkamesto.site/what_is_a_royal_flush_in_cribbagedy38z.pdfIn PDF document text
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/lasovenijuketed-xudiji-dozovoki.pdfIn PDF document text
    • http://canlisohbetim.net/what_makes_a_childhood_traumaticg0vpb.pdfIn PDF document text
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/bdd41b.pdfIn PDF document text
    • http://rodina38.ru/50348019141hqmms.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/zijuguxuwotowubalow.pdfIn PDF document text
    • http://bet-info.ru/vubusz0tqs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexasejuwodeji.epizy.com/nota_keuangan_apbn_2020.pdfIn PDF document text
    • http://pixagikaw.epizy.com/18842648615.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/indian_national_anthem_song_now.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/how_to_program_comcast_remote_to_magnavox_tv.pdfIn PDF document text
    • http://jeximojela.myartsonline.com/jixubixotesa.pdfIn PDF document text
    • http://xizokokov.epizy.com/48992695299.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_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 5116 bytes
SHA-256: 136c3640cb87b0b5c34ce24ebf1789b2a8dbb6ae2be77ed3147f63af81cfce48
font_01_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 11672 bytes
SHA-256: 81b287e110791b4896754ca30b058f7268012729930b500aeb03495010111ffe

Open this report in the interactive analyzer, or submit your own file for analysis.