Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6823f8c9653d417…

MALICIOUS

PDF

81.7 KB Created: 2021-05-12 01:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 047ba5c3677c7f470915fb5bf777887a SHA-1: 9621b896f9348532ac01db8e29cf776782b9d2cb SHA-256: e6823f8c9653d4172efcd4f5c2021aa1451d28558b53521c06aa11330033377f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=principles+of+design+proportion+in+fashion PDF link annotation
    • https://cdn.sqhk.co/musezikuzapi/hidhfhj/20343909309.pdfIn PDF document text
    • http://keto-menu.online/vidmate_apk_free_installwt7ll.pdfIn PDF document text
    • https://xesejiru.weebly.com/uploads/1/3/4/7/134716288/6238441.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ifbnijX/adidas_sweatpants_mens_black.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/navup.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/h6gjohi/bloons_tower_defense_3_moab_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/dePy0gi/wufotude.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/VhfRiay/14013135147.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/2017_lexus_gx_460_for_sale_near_me.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/2026182.pdfIn PDF document text
    • http://javosewo.sportsontheweb.net/fikipevubotifizuguxosava.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/9.3_naming_and_writing_formulas_for_molecular_compounds_worksheet_answer_keyicv3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_b596283b77d049db9abc2faf7beb4fc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/limamavamarokodex.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/5955400123.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/interview_handling_skills.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_bf7c30581dcb4787affe6f0e87013b58.pdf?index=trueIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_944ca89c0f5e437f9741202393c8fa00.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_388d8249f60c49588b1943390784de4b.pdf?index=trueIn PDF document text
    • http://dirulibas.onlinewebshop.net/x_core_hunter_sprinkler_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/felafexek.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/13579412585.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_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 5420 bytes
SHA-256: 25d70e6763a5a64291c574a24956426dc30148aa9553c38b3da69580727d1f1d
font_01_sfnt_off000113e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E4 10264 bytes
SHA-256: 64fa862c66aaf9ed6db5960546f5f31f0774440cb26b39cb65c5447fb9d0bce9

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