Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20ce10d76de9aa1…

MALICIOUS

PDF

84.4 KB Created: 2021-03-23 16:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 414a6cbff50ee20b573d891f185ee08f SHA-1: 7eca4dbaf914fa43eb2de0412c277b9c677483b8 SHA-256: b20ce10d76de9aa1362644cb5d3c4b342b2d65117fcaa24828e25273f38635a0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains external URIs pointing to suspicious domains, suggesting it is designed to redirect users to malicious content or download further payloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=mx+anywhere+2+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/moturalogupe/4jhiihb/dodade.pdfIn PDF document text
    • https://cdn.sqhk.co/garonuvinug/4zheji0/wasinomuva.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/SeG0Y04/game_level_designer_salary_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/yLzhdXN/sonemivep.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/uEjfHjf/22125619768.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/X9Hjbgg/explore_learning_gizmo_carbon_cycle_answers.pdfIn PDF document text
    • http://seamanygau.best/pdf_formato_de_carta_responsiva_de_compraventa_de_vehiculos_para_imprimirsoggr.pdfIn PDF document text
    • http://redtea.space/wogerurepogofawammif8.pdfIn PDF document text
    • http://com-copyrighit.com/oedipus_rex_critical_analysisf7en2.pdfIn PDF document text
    • http://todayshop.website/7045815313755tz4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/20b24aa5-300d-4232-adc6-3ec33e17a27d/dapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65f7629-fb33-4cc3-bcc1-a04216fd71b6/43004102777.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/jixadikaxerobeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872caf38-324c-4df2-969e-597f8be800d5/harga_salon_jbl_eon_615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e83c5368-05d2-4aba-b1db-2050ab4bdbd8/76698131733.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/basic_algebra_worksheets_year_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8494c9-c9ba-4d3e-b238-a088c1359239/gemamixun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dcef6a-9a81-4a8e-afc1-41c6ac3c7513/67271518633.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/robiputekerov.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/begeluromilagez.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_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 4864 bytes
SHA-256: 2875bdfe743a1afe9bc78aa0d53771464c22fda7431cb0781c5d04ee898228ba
font_01_sfnt_off0000fb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8A 5320 bytes
SHA-256: 7f11068dce71c3d950600b7575ab112dde8b7943bd16c6ccbe3c7247a2b346a0
font_02_sfnt_off00010d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8C 11400 bytes
SHA-256: ab9c8936c5cff75f7f5e995d4b0ab811ffadb73749314703676f4de2618f9a5e
font_03_sfnt_off0001343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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