Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70bbf89561cbdf3…

MALICIOUS

PDF

80.1 KB Created: 2021-04-01 06:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37a6d49f92c5cee544208e8b3d4bb6ca SHA-1: 74fc88d41b9ab966e351bec0ce829107fc182f70 SHA-256: e70bbf89561cbdf3352d2abfb6e0ba7ea5f4c93c90e84bae53b0781acbdb967b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Ccna ti�ng vi�t pdf'. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=ccna+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t+pdf
    • http://premiumpornclips.com/percy_jackson_and_the_olympians_in_hgu7er.pdf
    • http://shtangelkipokupkiitd.online/pufedolisdanxo.pdf
    • http://sibuvre.com/xiworesopeqxt.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://wonamesavap.iblogger.org/batakokidibexelumajugo.pdf
    • http://mxbur.fun/682880855230yysc.pdf
    • http://reliables.ru/xusufoladilefefororamasibpzx25.pdf
    • http://xapakemulu.22web.org/heredity_worksheet_5_answers.pdf
    • http://bioforce-co.site/physiology_of_heartzebdd.pdf
    • http://oblakova.ru/tukutebugojeliwedutla419.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purufiz/transformers_g1_bumblebee_voice_actor.pdf
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_5ce4ff88bf21410b92420f044344efb6.pdf?index=true
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_6e0a4d3cb197444985a6a18183444b34.pdf?index=true
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_6fc170e6d474476da62581d488b921b7.pdf?index=true
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_f40fd46cc96f4c81aa6a6bca6bdcc259.pdf?index=true
    • https://s3.amazonaws.com/xenavuxa/formato_de_contrato_de_confidencialidad_gratis.pdf
    • http://selifesupenikiv.epizy.com/siwuxaluvubukares.pdf
    • https://s3.amazonaws.com/bejeseja/pefosawasozorudubabu.pdf
    • https://s3.amazonaws.com/dozuga/34603273033.pdf
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_83367b53142e454a89f4b42ceac5988f.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_off0000ed90.bin
fd8d077c66279635d087055917957af7582a5a577bc9404eb048d16f3140f915
pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 5320 bytes
font_01_sfnt_off0000ff3c.bin
841cf9efcbd97b56ebbbf05052e142a5e63def0aa79aa48ab7c41624c309bc89
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 22304 bytes