Malicious PDF — malware analysis report

Static analysis result for SHA-256 db65859c8d118f9e…

MALICIOUS

PDF

77.2 KB Created: 2021-05-12 12:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c7219fdbaecfc9490d0e8b9e0f983db7 SHA-1: 3090c824d712b3a9341ec750b6a4a65a830a1dfb SHA-256: db65859c8d118f9e91ac0c05ebda093622cc6bfc42b19855d50908f40f6a15cd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are consistent with a phishing lure or a downloader for a second-stage payload.

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://jacksth.ru/strik?utm_term=hyderabad+chatal+band+mp3+song PDF link annotation
    • http://xitabijasava.getenjoyment.net/quran_reading_and_writing_book_1.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/59397861133.pdfIn PDF document text
    • https://rusizatigaj.weebly.com/uploads/1/3/4/0/134041601/7701950.pdfIn PDF document text
    • http://eslife.pro/cambios_psicologicos_durante_el_embarazod4roi.pdfIn PDF document text
    • http://you-bestshop.xyz/pit_bike_racing_floridaxnusf.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/national_geographic_magazine_october_2020.pdfIn PDF document text
    • http://jofipifemu.medianewsonline.com/88229945450.pdfIn PDF document text
    • http://cmbclientes.com/50126354475rg753.pdfIn PDF document text
    • http://blancer.xyz/how_to_make_balance_chemical_equationshnip1.pdfIn PDF document text
    • https://puwawegolawibot.weebly.com/uploads/1/3/2/6/132682739/d8713cecae.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/83882572521.pdfIn PDF document text
    • http://pro-komp-master.website/21588926937wu0p3.pdfIn PDF document text
    • http://ecosbor.net/63492865845awcg1.pdfIn PDF document text
    • http://quickpapp.online/receita_de_chimango_de_forma_simplesel46f.pdfIn PDF document text
    • https://nefitajufu.weebly.com/uploads/1/3/4/7/134712437/mofasaweloruvuviw.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/molatajepagesizorelifap.pdfIn PDF document text
    • http://sibuvre.com/fowunifegimadirohseuq.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/16348916190.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/11136937451.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/tda7377_amplifier_circuit_diagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikimiwuwal.myartsonline.com/16387360181.pdfIn PDF document text
    • http://wugetad.myartsonline.com/merger_and_amalgamation.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_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 5852 bytes
SHA-256: afc7510ba5169077c8e8ea697715bb9af96042e3f9c590946843efc2897d565c
font_01_sfnt_off0001014a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014A 11156 bytes
SHA-256: 5061053641e665edf2c381dad612dc0a46af9c64448b6532ead1577b9750bbf2

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