Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9bbd97e258aac9…

MALICIOUS

PDF

70.5 KB Created: 2021-04-07 16:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0e797d1e1ec8de41f516574c30f9cf4d SHA-1: e9245cb10ca5d225d1efa7b36289cb341ad2259b SHA-256: db9bbd97e258aac98323bed3c0b4bdf68e7d936c818f23fecb006933015d550a
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://dugedepap.ru/wix?keyword=worlds+hardest+game+unblocked+3, suggests a phishing or malware distribution lure, disguised as a game. The document body, though heavily obfuscated, contains references to 'worlds hardest game unblocked 3' and the authoring application 'wkhtmltopdf', reinforcing the lure. No scripts were extracted, but the PDF structure and external URL are strong indicators of a phishing attack.

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://dugedepap.ru/wix?keyword=worlds+hardest+game+unblocked+3 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52e994c-bf26-4bd3-8d94-7a03481b60d3/trigonometry_solving_right_angled_triangles.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/kebafarilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069a8c9b-14d3-405a-ad17-8dd17e8c7828/midofuva.pdfIn PDF document text
    • http://polabufu.myartsonline.com/cardinal_vowel_chart.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/hoover_dual_power_max_carpet_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/94631761030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c8d098-06e3-4f27-a1b3-cdd3f3782286/farab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61483e65-8aea-4a09-99dd-411279c96b64/yiruma_spring_time_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265f51f6-175f-4698-9d44-c7df3f4acd2a/3_types_of_services_ap_human_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/nonoro.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/jizejubukinoxefemuku.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/dream_interpretation_snakes.pdfIn PDF document text
    • http://xarilupinedup.myartsonline.com/asset_allocation_questionnaire.pdfIn PDF document text
    • http://nixetatop.epizy.com/post_parturient_haemoglobinuria_in_cattle.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/heat_and_mass_transfer_fundamentals_and_applications_5th_edition_solutions_chapter_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe3f41b-797f-4689-881f-fc9a0f17b2da/how_to_study_for_nc_drivers_permit_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a385771-41d3-476c-b7d3-bdb2f54d7a46/bergeys_manual_of_systematic_bacteriology_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/who_is_the_new_host_of_first_things_first.pdfIn PDF document text
    • http://marakolin.epizy.com/instagram_photo_size_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/mejiborup.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_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 5736 bytes
SHA-256: 6f1ab5ca64f8d8b48b8f04c7ae76b14a7882add514fb89eb075e886984334862
font_01_sfnt_off0000ea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 10152 bytes
SHA-256: 647e86dfd44d606fe63e4bdd8b5d3cb2a8da5d5bf9c76f2039af55ca597386e0

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