Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc460b029034e64b…

MALICIOUS

PDF

91.0 KB Created: 2021-02-28 17:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 48349881774d0148454d5f030b4b7e78 SHA-1: 0a6f000193609729f4f945ce1383ea77a955a8dc SHA-256: bc460b029034e64bdbefb489d9c8a6378103f58ff4705e52ded72be5aff4e18a
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, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a technical search query, directing the user to a suspicious domain.

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://zajinet.ru/strik?utm_term=suburban+rv+furnace+igniter+not+working PDF link annotation
    • http://copyrights-notices-helps.com/nizikavewofolokofiga2sjip.pdfIn PDF document text
    • http://sosed.market/vexowogagufibourjaf.pdfIn PDF document text
    • http://honey-love.ru/miracle_thunder_2._91_crack_freeydhun.pdfIn PDF document text
    • http://naropiwazufilu.22web.org/fire_evacuation_drill_analysis_report_template.pdfIn PDF document text
    • http://kefets.xyz/966943727654sr.pdfIn PDF document text
    • http://abanca-electronica.com/27674703601sgqok.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/41732633404.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/12908151609.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/cara_setting_tp-link_universal_wifi_range_extender_tl-wa850re.pdfIn PDF document text
    • http://ighelpcenter.xyz/classdojo_for_students_at_homekwyxs.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/negonanopix/sifutoliwexosot.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/asoka_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/9303414681.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/ribikuxa.pdfIn PDF document text
    • http://sapakebozo.rf.gd/zazuwiwutexizapulopated.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/local_area_calling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/bcbs_federal_medical_policy_guidelines.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_off000128c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C7 5296 bytes
SHA-256: 2b36989f4c54d539e9e0f26264a4041eb588b537ca0221c38edbbca940ea2b52
font_01_sfnt_off00013afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFE 10516 bytes
SHA-256: 23d7567e62bb9d01311339667f5907ae64a482df68e8b4b6eb9b333da422e185

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