Malicious PDF — malware analysis report

Static analysis result for SHA-256 2698ac5c7d8fe82f…

MALICIOUS

PDF

73.0 KB Created: 2021-03-25 09:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dee0042ba85afeb3f5889eea22d32e11 SHA-1: 20355edc9fd7d3b20ca28bfb1dfa97de6d906ab6 SHA-256: 2698ac5c7d8fe82f1c1f66867f02dae7b24ba96128eaf7623b2ab935256f0c60
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one being https://pelibifir.ru/wix?keyword=vizio+d24-d1+power+cord, suggesting a lure to a site that likely hosts malicious content or attempts to phish user credentials. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=vizio+d24-d1+power+cord PDF link annotation
    • http://bumufirila.mygamesonline.org/14680279389.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/uhaPgjX/fire_alarm_testing_report_format.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/KhfieMG/21542803959.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/wages_for_housework_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_604a1360bd0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_603be81cd222a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415769/normal_604b58849c0ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_5fda099a4cd18.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/VgXhaic/62475005483.pdfIn PDF document text
    • http://lovawadawawo.iblogger.org/abhimanyudu_audio_songs_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/Xb0icjg/53239430441.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/16716744342.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/44123486732.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/0hcaghG/29004835146.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/tipos_de_funciones_lineales.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/alcatel_a206g_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fd643ff01c6d.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/lesiroxalatukiwewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojibikifi.myartsonline.com/97437324586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8792aaf6-070f-4383-b950-c43830ae9a9a/google_how_cold_is_it_outside_right_now.pdfIn PDF document text
    • http://tesetibixofi.epizy.com/wiloluterurizoguviwusuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296c8cc2-2ad2-432a-913a-30327cce85cf/91258939528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05d3dab-8c55-4529-9063-1c6748701788/73843368653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff16841f-3968-4978-bbe0-b98aa49b967f/63580742877.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_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 5060 bytes
SHA-256: cb6dcb1861553a4615e2c67b5a953f5cec18be2faf96c67d5c76e888d6c46b75
font_01_sfnt_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 11252 bytes
SHA-256: 677cd1921bf0926566e1287f625746678c91075ec6d69a16f340d8c8ce9039fb