Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd95baf4f714dbc…

MALICIOUS

PDF

77.7 KB Created: 2021-04-05 02:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 34fb45e17882fbc742b674fe4420343e SHA-1: dada538d7089b149a9d6924ce24989c157d75ce3 SHA-256: cdd95baf4f714dbcdc2074c8149f674142cdd1d4505c7e87ec5cb3a1bfc98a25
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 one prominent URL pointing to 'botokaw.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for link farms, reinforcing the malicious intent.

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://botokaw.ru/123?utm_term=sand+balls+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4527042/normal_5fdd42cdf0ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473622/normal_6032c1fdea32d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fef9d6ea3008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_603edfc1d247f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_600c44ad09ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_6018d9828207b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_60167ddd5391d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485570/normal_606200b7c1938.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406776/normal_5fde385d2571e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_6052b44e5ac8e.pdfIn PDF document text
    • http://nalomojup.22web.org/graphing_exponential_functions_using_transformations_worksheet.pdfIn PDF document text
    • http://zabatipudug.iblogger.org/zowafexolelososivoseriw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nexuvojof.epizy.com/magee_marsh_birding_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/14521844804.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/19521098913.pdfIn PDF document text
    • http://segigeserife.epizy.com/word_cookies_coffee_level_18_answers.pdfIn PDF document text
    • http://goxakimolo.epizy.com/metformin_1000_mg_tablets.pdfIn PDF document text
    • http://giwoxut.rf.gd/mixed_use_building_floor_plans.pdfIn PDF document text
    • http://wixobopi.rf.gd/xuxevedagizixizasikamiw.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/bollywood_new_film_box_office_report.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/kekalamaxebozilitanuzezip.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/dantdm_skin_minecraft.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_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 5316 bytes
SHA-256: 38f8f312b7809e1cd2dc600b84cbb70afd09dd053d83eb3fc6da9c4138c07df6
font_01_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 22344 bytes
SHA-256: 02d0b1a8e0d758c88356685e02371b7da2e46ab5e1a0bff61392e21368708cb8

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