Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a20f40c1023f86…

MALICIOUS

PDF

81.8 KB Created: 2021-03-15 10:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 25ba9cad9f46f152a473ac608dc93477 SHA-1: 8e83ab7bbd4b8007cbd49e580b7676b9617d8df9 SHA-256: 51a20f40c1023f86923422dc96042998da8314d8275f482c582173611c20cba3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many of which point to disposable domains and utilize UTM parameters, suggesting a phishing or scam attempt. The PDF's structure and the presence of numerous links indicate an effort to direct users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=millermatic+135+welding+gun PDF link annotation
    • http://sipebep.22web.org/indigenous_employment_policy_template.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/76513749945.pdfIn PDF document text
    • http://detonic-deutschland.website/why_is_my_bissell_proheat_pet_not_spraying_water939xw.pdfIn PDF document text
    • http://lumejaramelu.mygamesonline.org/stormie_omartian_free.pdfIn PDF document text
    • http://shopsupergood.site/litiluwibikufoltjt6e.pdfIn PDF document text
    • http://carins.info/how_do_you_replace_a_briggs_and_stratton_carburetor3d1gw.pdfIn PDF document text
    • http://mewanomape.iblogger.org/harrison_bergeron_literary_analysis_skillbuilder_answers.pdfIn PDF document text
    • http://namunogetivij.iblogger.org/botox_aftercare_sheet.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/dbx_earnings_date_q4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5fecbc5584b89.pdfIn PDF document text
    • http://lesagotefawa.22web.org/biomedical_informatics_stanford.pdfIn PDF document text
    • http://zulopamelaz.22web.org/advanced_engineering_mathematics_10th_edition_solution_manual_chegg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471236/normal_5fd87a3876bbe.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/38148493586.pdfIn PDF document text
    • http://zafufevede.iblogger.org/11335430614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5fd6ee1b7a63a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://purupuladufuba.rf.gd/split_into_pages_adobe.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_b53670e32cda47ac920ff5c00e243424.pdf?index=trueIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_a1e7d287a5864005a5799aeeffd438ed.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_acaf2dc116774d148f73fbfc57a40a6e.pdf?index=trueIn PDF document text
    • http://tomoveko.epizy.com/formato_reporte_de_mantenimiento_preventivo_aire_acondicionado.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_39a2792a9f084dae92466d1f8ad0753e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 5288 bytes
SHA-256: bfa0149ad36ba71a47a7b4bce8dd00ff8232aa93ec3b7ee5d88481a5346f468c
font_01_sfnt_off000103f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F7 11588 bytes
SHA-256: c52ee7dd7a2c6a878ad4ad73c2efe26861f8bf506d78e23633206aadae22ec50
font_02_sfnt_off00012b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34