Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbfc59f9fd5539c…

MALICIOUS

PDF

75.3 KB Created: 2021-06-09 16:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ee96417276049c8aa2b8bc5c23cd9f16 SHA-1: e466a086d47cb90e81ad86b8615433f8dd3a2f93 SHA-256: 7bbfc59f9fd5539c14fb40289ecf8ac63d63234d27fc46d4c9d43dcbcbe7b664
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 URL pointing to 'ketchas.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains references to a game, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ketchas.ru/pbw?utm_term=pokemon+thunder+yellow+rom+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407729/normal_6056da47dfeb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_605199985cf48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478402/normal_5feddf7433d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5fd721b28339b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_6066d03822086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_604feebdebdff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425504/normal_600236406689f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_606ba2752f1d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5febfd4db0698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5ff9ce29265bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_6012962142f06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newubotadov.pbworks.com/w/file/fetch/144753069/vapiluzajesodofelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de61fb48-002d-481b-ad96-2e9b995b64d5/84206568437.pdfIn PDF document text
    • http://mawasuwov.pbworks.com/w/file/fetch/144914571/tile_hop_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75ed391-971e-4cd9-8d99-2d3c6e2f1ed4/sitajixugewuwuwob.pdfIn PDF document text
    • http://kigemulu.pbworks.com/w/file/fetch/144564594/technical_report_writing_today_ebook_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa154b7-8d20-4ad2-9a3d-be4ba90fec06/what_is_a_star_astronomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64810be-8cc1-421a-875c-0dc40d36f67c/magic_bullet_walmart_11_piece.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d015899b-bf69-4db8-af50-0ca39252fc0d/85985117526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d25374e-246b-4a66-bbc9-3839b719099c/8129778013.pdfIn PDF document text
    • http://tedadopite.pbworks.com/w/file/fetch/144664209/estadistica_descriptiva_rufino_moya_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f32409b-749d-4636-82f3-d72fadc69017/7426378965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80477b40-7e3f-45bb-8c38-79a5e64c11e0/1472098993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc80867-84b0-43fe-b259-10945d4ecaf6/example_of_conversational_al.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c35a95f-83b0-4030-aa39-6854fb4ed991/fill_in_the_missing_numbers_to_100.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5260 bytes
SHA-256: 3e44be7930612507fb186ebcf962e32d2d45f7d85633cce3c89e17260eb539fe
font_01_sfnt_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 12256 bytes
SHA-256: 86407bc8c522cd7b83f7fdcaf1d265409452c6bbae68a5ed1a824a24c7f41233