Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25f6d72378ff4a4…

MALICIOUS

PDF

75.3 KB Created: 2021-04-05 04:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7a0610d52635bf6a2d4fd5f239a05371 SHA-1: c55d317fc6aefd61d8eba56697ab15518222b1cc SHA-256: b25f6d72378ff4a491925f3ece21debaa6221fc1b41e5997b432a9263c289206
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to resetting a bathroom scale, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=how+to+reset+ozeri+bathroom+scale PDF link annotation
    • http://alisaborodaenko.design/488273834402ks6.pdfIn PDF document text
    • http://levantemosaic.com/guess_logo_level_59i0oha.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369901/normal_5fec2ebc41c95.pdfIn PDF document text
    • http://shopmzm.site/kaxabedodobupitufuruxa550.pdfIn PDF document text
    • http://ribugiwegi.22web.org/68015811057.pdfIn PDF document text
    • http://usecabinets.xyz/28682066985n0bk4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468534/normal_5fc5a0a593a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_606660335db2a.pdfIn PDF document text
    • http://bluetea.space/zagidubogelobazotufazusem583yc.pdfIn PDF document text
    • http://nawukebakesejid.iblogger.org/supuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60640fd08fac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_603b0f246c77f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464313/normal_5fd094ada6a11.pdfIn PDF document text
    • http://digtalcaliper09.xyz/24038890738cpoiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_6031ce320d594.pdfIn PDF document text
    • http://shoop-fh.ru/dark_forest_village_minecraft_seedief2d.pdfIn PDF document text
    • http://justiciaforjustice.com/what_is_analyse21gs7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molegonemuk.rf.gd/princess_diaries_11_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/30647012792.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/diwifopinimebaxesojak.pdfIn PDF document text
    • http://niwaraz.epizy.com/lucent_ecology_and_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/option_volatility__pricing_workbook_practicing_advanced_trading_strategies_and_techniques.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_off0000e955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE955 5284 bytes
SHA-256: 4b6848c73462b6d262fadb20602be82931289c597717375f50edeb2530191879
font_01_sfnt_off0000fb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3A 10764 bytes
SHA-256: 80c196035d5a08d25f8b403012de8b33699fa5c51972868230bd6259ec9b07f3

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