Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab058bdc4cee800f…

MALICIOUS

PDF

69.8 KB Created: 2021-02-21 09:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c884278a120665c3d6d1f3266215e0d SHA-1: 396191ae428758ddbcea061f7629f290d3768b32 SHA-256: ab058bdc4cee800fa986d58d989b279666f7bcf0e8e1480e4b2498c791026812
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=how+to+behave+and+why+pdf PDF link annotation
    • https://cdn.sqhk.co/nexoratuxi/giWgfdQ/bovemogipu.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/hecujgJ/63403584532.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/7TrhaOo/64840466171.pdfIn PDF document text
    • http://besuxiju.22web.org/75633703316.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/eJiihjg/raid_ant_powder_and_dogs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_6011db88ef5e6.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/ckejgzm/55175728464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fe7d17787793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ritoma/gapawelemawumosowug.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/22005489779.pdfIn PDF document text
    • http://vinagakibozune.rf.gd/46321429000.pdfIn PDF document text
    • http://xaposekesudonod.epizy.com/83022543406.pdfIn PDF document text
    • http://begukisar.epizy.com/beringer_white_zinfandel_tech_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/bed_sheet_set_sale_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/monthly_budget_templates_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/insurance_card_template_free.pdfIn PDF document text
    • http://teveniwavabubak.rf.gd/phyllo_pastry_sheets_recipes_appetizers.pdfIn PDF document text
    • http://kabudevegal.epizy.com/wubedixogewemawogavaxoxid.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_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 5176 bytes
SHA-256: 30d251918748907355c147960d422ef67729e4f394ccdceb1776339ebef5d3fd
font_01_sfnt_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 10572 bytes
SHA-256: 86b4e7842269857b71b4fee04e224dcce319a315c7fb8d75add003fb37ed9b30

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