Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a5c870741e0023…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 09:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cbf3d09b62445b434f854e52c9b89098 SHA-1: 02f384f9d84ad4448d2ee3a5a8f74c6d3e307088 SHA-256: 73a5c870741e002366676ee4449dfaf78e485179694d0b35fc6eca18d5985729
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to resetting a Lenovo laptop, suggesting a lure to trick users into clicking the malicious link.

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://dugedepap.ru/strik?utm_term=how+to+reset+lenovo+laptop+t430 PDF link annotation
    • http://bejawutipage.mywebcommunity.org/agamben_livros.pdfIn PDF document text
    • http://com-connexion.xyz/basic_ubuntu_linux_commands_listno7wh.pdfIn PDF document text
    • http://golden-charm.ru/calculus_6th_edition_by_swokowski_free_downloadel6lj.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/char_broil_analog_electric_smoker_instructions.pdfIn PDF document text
    • http://erogan-columbia.site/91830885018t850x.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/el_maestro_del_prado_gratis29mzu.pdfIn PDF document text
    • http://prodit.space/cv_format_for_job_filepkhal.pdfIn PDF document text
    • http://useraisins.pro/is_cfa_marketable_in_kenyacs7np.pdfIn PDF document text
    • http://onlinesos.tech/zumapodigk072z.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/ginutu/rajakogi.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/angry_birds_space_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/42846446161.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/78894445251.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/jopikimokunogolawuxejoki.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/carlito_olivero_x_factor_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/twilight_graphic_novel_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/image_licence_agreement_template.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_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 5320 bytes
SHA-256: 268fecdeca5514d50a89ff11eb925c8ab59f42460743c74599e89614a14ecacf
font_01_sfnt_off000111d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D2 11852 bytes
SHA-256: b6dc612b6dddc8edf1cd0881f94af2ebf61c83f2413e181e608f52782451a99f

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