Malicious PDF — malware analysis report

Static analysis result for SHA-256 5722b484a00ada15…

MALICIOUS

PDF

79.5 KB Created: 2021-03-01 00:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1fb75a4632d99a114203004b14f0209d SHA-1: a2035bb7874f902c125ad640f16ff77c19c31785 SHA-256: 5722b484a00ada1543b2bf3eb9a0c1b9fba2dc5365af9c05a781a99577249c00
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit users by masquerading as legitimate content to facilitate the download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/123?utm_term=coding+interview+questions+narasimha+karumanchi+pdf+drive PDF link annotation
    • http://trysoda.pro/dead_or_alive_xtreme_3_guide_bookhxlde.pdfIn PDF document text
    • http://myluckybet.xyz/peace_is_every_step_kindlebykjp.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/jiOibfA/11543799864.pdfIn PDF document text
    • http://ranking-se.com/50368887969jx3ne.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/gfljbf8/35797716895.pdfIn PDF document text
    • http://pisodanijuke.iblogger.org/ardaas_karaan_2_song.pdfIn PDF document text
    • http://negurosivaz.iblogger.org/kabizofupenop.pdfIn PDF document text
    • http://hh666o.site/how_to_write_a_rhetorical_analysis_outline1y9ua.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/jheTBqp/11street_malaysia_contact_number.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/e2facdeac1b.pdfIn PDF document text
    • https://nonexivibofopuv.weebly.com/uploads/1/3/4/6/134603010/e08436e636261c1.pdfIn PDF document text
    • http://wasatosu.sportsontheweb.net/albert_beveridge_the_march_of_the_flag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/mafeziratiwesetewutox.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/how_to_do_a_cost_analysis_template.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/72736359299.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/satotajapakufanarefezi.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/weight_watchers_by_conair_4-user_memory_glass_body_analysis_scale.pdfIn PDF document text
    • http://xadiromawa.epizy.com/96295846110.pdfIn PDF document text
    • http://fepaxediv.rf.gd/powerflex_525_ethernet_settings.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 5784 bytes
SHA-256: 2edbafa704246baf05b942a84cff3e9eaff7d7925090370510bd42d851d83a2f
font_01_sfnt_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 10916 bytes
SHA-256: c8711dfa3c526d3a559f0c3bc0b91f67f39c0ebf42ce72ad2a2db9486686cade

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