Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f91a19ac405fc22…

MALICIOUS

PDF

83.6 KB Created: 2021-02-03 06:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 924f4765979bbd47650a207e4c31e5ce SHA-1: e98a3c37c20b95a8b42661390b099325b317ba4c SHA-256: 5f91a19ac405fc228dcdcd9e5f67a2b40283dc6e15b6b27da7edf093cf433270
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of an external URI suggests an attempt to redirect the user to a phishing or malware distribution site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=jennifer+eagan+wcvb
    • http://socialwave.me/tkb_guru_agama_islamdldsq.pdf
    • http://itfamily.pro/18088982032ju932.pdf
    • http://aromaita.space/chord_progressions_for_songwriters_pj2ubh.pdf
    • http://tikovg.xyz/1285663460ssh3x.pdf
    • http://rarebuzoxexovom.22web.org/91947404444.pdf
    • http://meetchat.space/584609500010529.pdf
    • http://study-english-05.site/pradhan_mantri_awas_yojana_application_form_in_kannada8vkvm.pdf
    • http://tameenegypt.com/wood_cnc_machine_for_sale_nzdwojl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pokixovuxik/pefipufopunetagafexos.pdf
    • https://s3.amazonaws.com/gafedupeba/bugatinewudozivowu.pdf
    • https://s3.amazonaws.com/faxaxos/clearfield_pa_police_reports.pdf
    • https://s3.amazonaws.com/bokelur/google_chrome_64_bit_win_10.pdf
    • http://bizosonifokep.rf.gd/breast_tumor_classification.pdf
    • https://s3.amazonaws.com/zubuwujoxom/o_alienista_machado_de_assis.pdf
    • https://s3.amazonaws.com/rakabexozu/25915716577.pdf
    • https://s3.amazonaws.com/tupofelasujewas/actividad_epileptiforme_de_espigas.pdf
    • https://s3.amazonaws.com/juduk/ashrae_handbook.pdf
    • https://s3.amazonaws.com/nagev/microsoft_windows_server_license_guide.pdf
    • https://s3.amazonaws.com/resisuna/mezagalojeduxutapifi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ba6.bin
a84bbc7ac20b43db8fb1e83715c2c6e0bdde45245be9896b79d14534d0847ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA6 5120 bytes
font_01_sfnt_off00011d46.bin
905cdeb16ee1753414f418d45ee57bcdfef04778336c1399286aafe72e8ccfac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 10100 bytes

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