Malicious PDF — malware analysis report

Static analysis result for SHA-256 137793839895f4aa…

MALICIOUS

PDF

76.7 KB Created: 2021-06-10 17:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e80655a7acf16ca98b50ef1154b1eea SHA-1: 2c7f703d9d5739f645706f83eabf1cb4317f5e54 SHA-256: 137793839895f4aa5a6012a87cb2d9f04a314c8622f26a08a02f1f04c08f3651
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a domain known for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/pbw?utm_term=happy+birthday+vandana+cake+image
    • https://cdn-cms.f-static.net/uploads/4388041/normal_6011bb917c581.pdf
    • https://cdn-cms.f-static.net/uploads/4414332/normal_606c09d069e06.pdf
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/224ed6597f50a09.pdf
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/611d293e.pdf
    • https://cdn-cms.f-static.net/uploads/4494436/normal_604d20922ad89.pdf
    • https://xexasatokotubeg.weebly.com/uploads/1/3/4/3/134354060/favedaweg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5edeea9e-772b-46c3-9f9e-d6b768558a01/are_hitachi_tvs_good_quality.pdf
    • https://uploads.strikinglycdn.com/files/d4203a45-04ef-4dba-ba9f-2bebbdb03041/woferevenikupat.pdf
    • http://buzivevej.pbworks.com/w/file/fetch/144824754/67973518435.pdf
    • http://ritijix.pbworks.com/f/kesixobeg.pdf
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144577731/sam_cengage_excel_project_answers.pdf
    • http://winubuton.pbworks.com/f/baaghi_khesari_lal_yadav_full_movie.pdf
    • http://lopofemusun.pbworks.com/f/bevimujedobovozifek.pdf
    • http://nerobedevu.pbworks.com/f/how_much_data_needed_for_netflix.pdf
    • http://difusowafid.pbworks.com/w/file/fetch/144640299/how_much_does_a_nitrado_ark_server_cost.pdf
    • http://mibegenav.pbworks.com/w/file/fetch/144666378/xixitowakinage.pdf
    • http://bovojigu.pbworks.com/w/file/fetch/144711888/orgullo_y_prejuicio_y_zombies_pelicula_completa_en_espaol_latino_youtube.pdf
    • http://buvavipoluvu.pbworks.com/f/67632966291.pdf
    • http://mapaduzipi.pbworks.com/w/file/fetch/144521940/ccna_2_practice_skills_assessment_chapter_7.pdf
    • http://kokoxudalux.pbworks.com/w/file/fetch/144428031/67346489835.pdf
    • http://lurigoluj.pbworks.com/w/file/fetch/144928092/mcpe_monster_1.12.pdf
    • https://uploads.strikinglycdn.com/files/6f9ad7f3-a474-43a0-9d5e-9f6570c351cb/88830935015.pdf
    • http://liguduper.pbworks.com/w/file/fetch/144630624/clinical_criteria_for_borderline_personality_disorder.pdf
    • https://uploads.strikinglycdn.com/files/bd08f821-5541-40a5-9b01-c7c13affd1a5/53113694910.pdf
    • http://gatasulupu.pbworks.com/f/best_ppsspp_games_download_naruto.pdf
    • https://uploads.strikinglycdn.com/files/fcf72298-d8c0-4510-88dc-699d518dcab6/honeywell_wifi_thermostat_rth6580wf_user_manual.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df32.bin
7cc5731ed8b0c4ac9aefdf4c74f0b0abbb83ec15ecc1807d7e6e2da4279ff982		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 5280 bytes
font_01_sfnt_off0000f0f6.bin
cb0e64c0e2f2470f54b8ace6bd240a5c5427f6b3e6e49f401f3b7f2c3e5ccc90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 11332 bytes
font_02_sfnt_off00011706.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11706 4324 bytes

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