Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e671836b50c5457…

MALICIOUS

PDF

86.7 KB Created: 2021-04-04 22:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 18eb52e38a93240f237fafa79488766d SHA-1: d853274c9a52a4276de8352b44917da604f3a839 SHA-256: 5e671836b50c54574b27ed4643dfb2170563f769ec9e603f417e4ef371d5d244
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=how+to+train+your+dragon+4+tamil+dubbed+movie+download+kuttymovies PDF link annotation
    • http://godotobekof.scienceontheweb.net/samsung_galaxy_tab_2_7_inch_battery_replacement.pdfIn PDF document text
    • https://fatomomome.weebly.com/uploads/1/3/1/6/131606630/zadavelotowajod.pdfIn PDF document text
    • http://kugimanuvo.iblogger.org/47963545158.pdfIn PDF document text
    • https://fafapiponuge.weebly.com/uploads/1/3/4/6/134692005/15d4aef3e4b.pdfIn PDF document text
    • http://tadakon.iblogger.org/adobe_acrobat_editor_cost.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/vivubaxokukuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafazox.rf.gd/mathematics_formula_ebook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/bradesco_seguros_auto_2_via_boleto.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/mystic_messenger_answers_to_get_hourglass.pdfIn PDF document text
    • http://sibubixusa.epizy.com/ccrpi_calculation_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/63366267349.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/5594500804.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/site_reliability_engineer_salary_google.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/2005_jeep_grand_cherokee_laredo_lug_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/boite_aux_lettres_normalise_grand_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/how_to_update_livewire_ts.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/centrica_plc_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/64827123545.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/zejuviwedeb.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/coral_banded_shrimp_care_sheet.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/capitalismo_neoliberalismo_y_globalizacion.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 5652 bytes
SHA-256: 4c7ffc439902849cc8cf1ea56495534f2518a293694f870aefaa019183514dea
font_01_sfnt_off00011380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11380 10836 bytes
SHA-256: e31cc21744f6bacafc938355c258c12423187ab9cfb20ffb7fb4ad1bd5d6a70d
font_02_sfnt_off000137d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D6 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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