Malicious PDF — malware analysis report

Static analysis result for SHA-256 6311de05b7ccb763…

MALICIOUS

PDF

85.3 KB Created: 2021-02-21 12:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 23958dcba166d0e9451dd1cc875c3e37 SHA-1: 8ec17c9821c911ab29c579359c9b59ab8df57e32 SHA-256: 6311de05b7ccb7634fafaa0ed1405d6f267bc4b43b40902f5ffe18cd985fdf51
96 Risk Score

Malware Insights

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

The PDF document contains a URL that appears to be part of a phishing lure, disguised as a technical support query about a tablet. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a malicious site or download further malware. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://jacksth.ru/strik?utm_term=my+nexus+asus+tablet+won%2527t+turn+on PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5ff935bf7593b.pdfIn PDF document text
    • https://cdn.sqhk.co/tumokufagu/GZ9ggjy/80809354827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_60192e5d38cfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393635/normal_5fcdc381a4c4f.pdfIn PDF document text
    • https://cdn.sqhk.co/mirusopujame/XigCMhj/okay_meme_gif_download.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/gd3Ggl4/real_police_car_simulator_police_car_drift_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/lunajevon/hic5ehc/necromancer_build_season_21_skeleton.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/OqgjheI/xegexiwefuduso.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/6Kagige/lethargy_definition_in_chinese.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/hbgigih/subexiralivubira.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/ginutu/37947910405.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/warhammer_vermintide_2_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/financial_accounting_8th_edition_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/61901839693.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/rational_functions_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/bukefutobogule.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/bowigulimugubovususititet.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/56249218045.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/manajemen_sumber_daya_manusia_perusahaan.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_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 5120 bytes
SHA-256: a531d202ffeb0e3071c375903402489e0823b14ff567b3787182759cec46b5f4
font_01_sfnt_off00012217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12217 11016 bytes
SHA-256: 89515c7b14e455f2c2d70f85b28a9d72a29d51919ba9096b34d49852073f1404

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