Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c571240e7a0cb4…

MALICIOUS

PDF

93.1 KB Created: 2021-05-10 05:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26254834ec9e2f94df16cb3ef8bf2ada SHA-1: 243d2a8ab6f50b6cbe4620c2deea065cae97ed67 SHA-256: b6c571240e7a0cb4a9ca799b36c32d3ec4a916b5eedce51b802ec1ed8e7abf45
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 suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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://kuzutuzo.ru/strik?utm_term=what+are+the+components+of+ad+campaign
    • https://cdn.sqhk.co/pasezateda/rCb5Rjh/car_master_3d_apk_mod.pdf
    • https://cdn.sqhk.co/gimanoretev/i06kiaE/vidmate_song_er_apk.pdf
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdf
    • https://cdn.sqhk.co/toromerepowa/jgcijcp/go_to_car_driving_game_download_apk_mod.pdf
    • https://xidolunojedi.weebly.com/uploads/1/3/1/0/131069950/4472727f.pdf
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/28835db3891e3b.pdf
    • https://cdn.sqhk.co/bifoligi/g0oiiia/new_ringtones_and_notification_sounds.pdf
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_e69e21da03074d658e3a2f75a81b72d0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/97cf7c95-5dfc-48af-bb40-c98f6864b5c6/learn_how_the_stock_market_works_youtube.pdf
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_3d5c665def2546b795678a137668fcd9.pdf?index=true
    • http://bokapiwupepox.rf.gd/how_do_you_insert_a_hard_return_in_excel.pdf
    • https://uploads.strikinglycdn.com/files/af767810-a45e-449e-81ea-e667074adc79/44069621452.pdf
    • http://juvizerosuzabuk.rf.gd/canter_assertive_discipline.pdf
    • https://uploads.strikinglycdn.com/files/ee059bbc-13f5-4d60-9c45-ec9f1c8ae0b5/12356437858.pdf
    • http://nokefibazapowem.rf.gd/gubawabotapap.pdf
    • https://uploads.strikinglycdn.com/files/114b2190-2adb-4417-bc2d-35eb2c1e4251/microsoft_asp_net_tutorial.pdf
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_7dd01229808c4744888a9a8bd08e54c0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e67.bin
8a47727981b34bbc62200414a8e692ff580e2397c92b0fb15b1415f68d8649e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E67 5552 bytes
font_01_sfnt_off00014126.bin
3379219596d69ac6bfee9b229440c38c6550079a8d12c2771cf3dbe3fcbab81b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14126 11156 bytes