Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16734e24a4402f7…

MALICIOUS

PDF

92.1 KB Created: 2021-03-19 18:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 85d465e230cb547782679bb6706398c4 SHA-1: 6d04439fa0014fdefe2598d3afba25fac07284c3 SHA-256: d16734e24a4402f75d3abeba528ee676341869357b8612469ebce31e8fdcc374
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious URL, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'robots vs zombies hacked' and 'wkhtmltopdf', suggesting a lure related to gaming or hacking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://leonvi.ru/wix?keyword=robots+vs+zombies+hacked PDF link annotation
    • https://cdn.sqhk.co/baxijaxazixi/rjckiFM/2538366768.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/Whihg0M/95723231070.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/Ggcnhci/48988083267.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/hhKTUoF/gisufadumulirefedavum.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/9c614ba2-122b-4212-be0a-2f4ecca0fa24/derecho_procesal_civil.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/jpg_to_small_file_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/python_code_coverage_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46096ee8-704c-45e5-8b9c-abc390986f9a/28567651403.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/spotify_premium_gratis_apk_2019_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/37893573934.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/kinds_of_animals_worksheet_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/78942890764.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/mackenzie_charitable_giving_fund_grant_recommendation_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ad1063-058d-4b65-90e5-5544f57ee5bb/zondervan_read_the_bible_in_90_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff57c2ac-e54f-4b02-8c2a-0f74eebb5145/how_much_water_do_i_need_to_put_in_my_pressure_canner.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/26577927657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0d747d-6c44-430d-ae1a-514505e3f81c/75009860680.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/android_vpn_proxy_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a1081e-fdf4-4011-91cd-85ec526aac7a/rebaxugubo.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/gold_platform_shoes_70s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fc9714-2c85-4229-95a5-23528e5c5364/how_to_value_a_used_caravan.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/49297839446.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/excel_spreadsheet_for_stock_inventory.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 2960 bytes
SHA-256: 3a99bfcc8a6322cb1f5d9dd0c76c95525b0630114fc12c53a342d41e6b6e0e01
font_01_sfnt_off00012081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12081 5372 bytes
SHA-256: 8105c061fcc151cb6617fd2400be28c3feae5443fbe749c00a2d1cadba3ddb68
font_02_sfnt_off000132aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AA 2636 bytes
SHA-256: 35bb435acf40d145cbbf078ebc4f4c60b5fb1128909fa2498efe8de98f54e43d
font_03_sfnt_off00013de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE0 10928 bytes
SHA-256: 2f059438e84bb07f67b1c4742e628d94c124d47b1a12747ea88f5bb0904f0cb3

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