Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0b45e10df383c9…

MALICIOUS

PDF

73.6 KB Created: 2021-02-24 23:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 163922b620e87e4d8ac94b82c13402b5 SHA-1: eb3c3eccd137131a3497423183916ba6e0d31ddd SHA-256: 6c0b45e10df383c9919f7b0bdc79d45454e2f10219c894a78ade1a9ec95ad5f0
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high heuristic score indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to contain keywords related to 'football practice', potentially used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=football+practice+for+8+year+olds PDF link annotation
    • http://martans.space/22121208853eintb.pdfIn PDF document text
    • http://gukukoraxolu.iblogger.org/nachiketa_chakraborty_briddhashram_song.pdfIn PDF document text
    • http://pomirkapa.site/csp_reflective_practice_template2ebm5.pdfIn PDF document text
    • http://whysmall.space/niziwijaravijiwagunbctf9.pdfIn PDF document text
    • http://sait-ok.ru/what_is_proctored_exam_mean0m0x2.pdfIn PDF document text
    • http://simultaneously.space/lapafunogt64y.pdfIn PDF document text
    • http://totalcreditcheck.info/john_deere_tractor_for_sale_-_craigslistp1vps.pdfIn PDF document text
    • http://findattime.com/in_which_of_these_bonding_patterns_does_x_obey_the_octet_rulecik2n.pdfIn PDF document text
    • http://like-store.site/36863790718go3n4.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/74834110396.pdfIn PDF document text
    • http://wiinorama.space/past_tense_worksheet_for_grade_3sw6wp.pdfIn PDF document text
    • http://dazenad.iblogger.org/how_to_update_your_escort_passport_9500ix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwuxuk.epizy.com/94063459589.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/how_to_build_a_small_house_cheaply.pdfIn PDF document text
    • http://fuwasal.rf.gd/in_social_learning_theory_gender_identity_results.pdfIn PDF document text
    • http://kuparego.rf.gd/fizeputimadoxurivazipop.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/piled.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/elapsed_time_worksheet_answer_key.pdfIn PDF document text
    • http://medelomozukomav.epizy.com/infection_control_in_nicu_guidelines.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_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 5540 bytes
SHA-256: e146fcf60adeaf9694e5f805ab2695f7b5650c96289b00a39c273d0ca714ee5b
font_01_sfnt_off0000f4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A1 10812 bytes
SHA-256: 3cc14084ae634bae155d3fdc740369c0090469f3313ad26c2e5020aa0766126d

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