Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1b380cd3d2acd4…

MALICIOUS

PDF

78.8 KB Created: 2021-02-15 07:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f1d7ead5b043d62b72eb154a2877ab14 SHA-1: a472fee08908445132589d4c7c14f1e015a100e2 SHA-256: 3f1b380cd3d2acd480ea0d326c54ad983ccbaa5a07be95b2ad40f5a5368466f8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://leonvi.ru/wix?keyword=etapas+en+el+desarrollo+de+un+equipo', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

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://leonvi.ru/wix?keyword=etapas+en+el+desarrollo+de+un+equipo PDF link annotation
    • http://urolog.xyz/questoes_quimica_ambiental_enemycoab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_600819cb39c5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382966/normal_5fe4856bc1415.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/lhcPBvh/uber_driver_app_not_working_2019.pdfIn PDF document text
    • http://chuvashovfamily.ru/vekugebotusegazarugirasutz0gw.pdfIn PDF document text
    • http://ver-alex.website/wozuwuzixutugenofisasoxa5cy10.pdfIn PDF document text
    • http://heleogose.online/bcbs_federal_pre_authorization_formks83i.pdfIn PDF document text
    • http://lonewawojelos.22web.org/10773709652.pdfIn PDF document text
    • http://grusha.space/15562676980l4i15.pdfIn PDF document text
    • http://salebox.shop/46113049966g3vcn.pdfIn PDF document text
    • https://cdn.sqhk.co/zitajazasu/gjijagh/mine_blast_level_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defipedibe/total_war_rome_2_carthage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/zenimidekeduliraga.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/77462150999.pdfIn PDF document text
    • http://gotazuvibidok.epizy.com/7934278997.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/feuille_cordiforme_arbre.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/animation_throwdown_mod_apk_1._88._2.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_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 5036 bytes
SHA-256: c76538204411ba202f77c914e8fb2cb6ce0fbcb55c2b7284aa540f7b025b3b37
font_01_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 12216 bytes
SHA-256: 15938faa01f9eaf9f311ff2dbc8b6ab681864f2e7eac86abc138bb28deb4cfbc

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