Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee87c376110af87a…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 21:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7cc6014dc004d546d045f40b64513c63 SHA-1: 4fe9834facf5338af707b5d6113cd1af7b5b2451 SHA-256: ee87c376110af87adcb4957581bbfe490ecb1b0b1be6bca2c2a1c2ede812fc45
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, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/award?keyword=chapter+7+bankruptcy+petition+pdf PDF link annotation
    • http://dawezedelofeda.scienceontheweb.net/kung_fury_2_cast.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/sujadifimiwakizutepenobif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fd13c52ef561.pdfIn PDF document text
    • https://cdn.sqhk.co/baxujebane/hbihPhd/free_process_gap_analysis_template.pdfIn PDF document text
    • http://xetorobexojukas.22web.org/canon_in_d_major_easy_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/hbhbjj2/muzokis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496170/normal_6032a10fedf5d.pdfIn PDF document text
    • http://nozatisesufi.scienceontheweb.net/cuddon_j._a._the_penguin_dictionary_of_literary_terms_and_literary_theory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_6048f3a675e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_605d66ffc1189.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/22757051604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_6015ca1a0b841.pdfIn PDF document text
    • https://cdn.sqhk.co/fifusaji/alfifhc/79389023058.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/nuptial_knot_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/Sifhehi/flight_briefing_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/80836721486.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/tanuwukirul.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/sat_math_books_2020.pdfIn PDF document text
    • http://rabibunipidozok.epizy.com/31749664892.pdfIn PDF document text
    • http://najijojovigom.myartsonline.com/calendario_escolar_2020_20_sep_oficial.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/partnership_appropriation_account.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/6298370888.pdfIn PDF document text
    • http://xiteberukebeki.epizy.com/petavowiwamopadimejanita.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/study_spanish_ser_and_estar_quiz_answers.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_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 5324 bytes
SHA-256: c954b6160787080fb54f7857390085447138c7b6dcefe8c60ef588f4ebdfe7ca
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 10712 bytes
SHA-256: 73a82471b748291d19312697f875e174648e874df8191f5fb72177b18c54cf1f

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