Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf6b94cc93ce90e…

MALICIOUS

PDF

76.9 KB Created: 2021-02-28 08:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 155ee60ad91005fbb553d80c8ca858b1 SHA-1: 6f0edb643912dbddf8e715051e46ad5d98b8fe71 SHA-256: 8bf6b94cc93ce90ecb5aeef8fb62acb9a77e9a2569315e91bb5eb4a5b182a423
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, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains keywords related to Logitech products, suggesting a lure to disguise the malicious intent. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=logitech+z-5500+reset+control+pod PDF link annotation
    • http://1ux.site/t_fal_optigrill_problemst9h0x.pdfIn PDF document text
    • http://luminar4-download.xyz/vudutiledareseduzbz29j.pdfIn PDF document text
    • http://cparta.moscow/536758724895lkq7.pdfIn PDF document text
    • http://makamar.tech/tejivowiwh1uwy.pdfIn PDF document text
    • http://nicechange.space/jaxazobozipevaparugusogom3nvx.pdfIn PDF document text
    • http://dutov.org/what_are_the_musical_symbolsb6cb9.pdfIn PDF document text
    • http://vezizulavojunif.22web.org/kupegilogeseverudomu.pdfIn PDF document text
    • http://kelnoteres.xyz/web_services_testing_using_soapui_youtube1gn13.pdfIn PDF document text
    • http://itayoga.space/20150988245k6tvk.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/17320754322.pdfIn PDF document text
    • http://slampochka.ru/democracy_in_america_summary_by_chaptern9x5u.pdfIn PDF document text
    • http://fallofelin.online/auditor_general_report_2020_ghana32hp3.pdfIn PDF document text
    • http://amaryllis.space/seben1l310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fivebo/durga_saptashati_in_kannada_free.pdfIn PDF document text
    • http://revifobatuge.rf.gd/part_time_night_shift_jobs_san_diego.pdfIn PDF document text
    • http://baxirogujugiji.rf.gd/31053244112.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/s2_molecular_orbital_diagram.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_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 5416 bytes
SHA-256: c1cf97aacdd22b8159ef49ef3e8f87b2254fbe11563e602c0bda82b249d6eee4
font_01_sfnt_off000101ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FF 10564 bytes
SHA-256: 6741543520a08a7610ced60eae6e0bf0129e8244022cc6e2af13920250dd3068

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