Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc491ff4f5037337…

MALICIOUS

PDF

75.3 KB Created: 2021-04-09 13:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1f21067be33436ed08683e6c53a737e5 SHA-1: 5d55d954cc87c1f5253002e4555b8d2912ac5844 SHA-256: bc491ff4f5037337bb43f45f1010a93623aa0d2bee17e0e4e6d37ca7f6132f18
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 malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to technical information, aligning with spearphishing tactics.

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/strik?utm_term=how+to+delete+dvr+recordings+on+dish+hopper PDF link annotation
    • http://bloodcraft.online/lutanigukutatapexowesatumwbatm.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/fjhfZTD/singing_classes_near_me_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/atkIU0N/saxudar.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/HgejhiX/13781389966.pdfIn PDF document text
    • http://maddot.space/35958039301hbtv1.pdfIn PDF document text
    • http://verification-help.business/street_fighter_fighters_30th_anniversary_collection_switch5e06j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_6009fb4754da2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_6039b4dc7ca2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449181/normal_6003b590b6b3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35525c6e-32ac-4896-808a-39b858a4fb6c/how_to_reset_nordyne_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de2cd76-cca1-4ded-ab77-691d0370e592/mmpi_2_profile_elevation_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/bugefuberuralelo.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/archived_instagram_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/heart_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/vulixedopuxedifamafe.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/ina_needle_roller_bearing_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/crescent_dough_sheet_recipes_with_chicken.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/46418817469.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 2960 bytes
SHA-256: 9e8301a812e0963997f2c69c75bfd39e7fcc44359b8a43baf6657440e065e79d
font_01_sfnt_off0000e9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 5240 bytes
SHA-256: b4604f3b8f7acc5a7ca109e4b9589a1c921abd6a9205e9616e60f39b6a36ed47
font_02_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 10464 bytes
SHA-256: c84e48a0717c7620c8631f11fd985e1ce03a24e8f0a6642ac689721e7599c5d9

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