Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d5134cf8abf91c…

MALICIOUS

PDF

183.6 KB Created: 2021-06-02 11:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 16e55e30f80638a21f7d69aef8654dc4 SHA-1: 6b842d423e8eb4a27d76d9df45fa4465c967a478 SHA-256: 56d5134cf8abf91cbf4b9e3420b950dc8ea6368e6c32d4c0f5b7d56cf39b7944
126 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is a link farm designed to redirect users to external websites, with one prominent URL being `https://wastran.ru/pbw?utm_term=trading+technical+analysis+masterclass+book`. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/pbw?utm_term=trading+technical+analysis+masterclass+book PDF link annotation
    • https://kupikonawu.weebly.com/uploads/1/3/4/8/134882044/9342680.pdfIn PDF document text
    • https://xafuzijinole.weebly.com/uploads/1/3/4/6/134667747/satoxejivigiferu.pdfIn PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/tilupujuxo.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144448200/rigozifasumejifemilok.pdfIn PDF document text
    • http://sikovifif.pbworks.com/f/bon_appetit_pressure_cooker_manual.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144427122/where_do_you_put_the_suffix_on_a_passport_application.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/f/how_to_combat_adverse_possession.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/dobomeb.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/w/file/fetch/144498708/71880793906.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/tony_robbins_awaken_the_giant_within_book.pdfIn PDF document text
    • http://garigor.pbworks.com/f/35163397382.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/22633953830.pdfIn PDF document text
    • http://damopijos.pbworks.com/f/61800677554.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144483525/fitudexejasorulogutedoxe.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/stick_fight_archer_mod_apk_unlimited_money.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/kuta_software_congruence_postulates_answers.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/how_to_set_luxpro_thermostat_tx100e.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/w/file/fetch/144496230/osmosis_and_hypotonic_hypertonic_and_isotonic_solutions_worksheet_answers.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/how_to_put_multiple_photos_into_one_mac.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/sowakojovikazubamam.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144419367/how_to_install_apeman_c450.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28950 1656 bytes
SHA-256: e477137fc7d52cf368cdb0a000f726dff0b21693de753a13c038183e07a2ada8
font_01_sfnt_off000291a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x291A2 5608 bytes
SHA-256: e47756c17c176ae4f8d766f9f9daf784a7ee9530ce8c8d68244049495b866eac
font_02_sfnt_off0002a490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A490 12112 bytes
SHA-256: 4bcdd481e442573ae72bec9c24a920b724ffdd80211d94202ac895bde9051353