Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb00182bdcdb88d…

MALICIOUS

PDF

89.0 KB Created: 2021-04-11 04:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a2f206f67a3a7a4c0594c7835f3d2a1a SHA-1: bfcd6f47e0e28fdfb80442145b682b345e7a7309 SHA-256: 1cb00182bdcdb88de65eb1892f7c00a3fb0bf64fc302f021f342fc7412cde5a1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed 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://fokemale.ru/strik?utm_term=dyson+cinetic+big+ball+animal+brush+not+spinning PDF link annotation
    • https://cdn.sqhk.co/xujuvotu/jfhhIDg/essay_topics_for_interview_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ggdjdpw/gekiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_600fa72301ac1.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/JEjaidV/five_nights_at_freddy_s_movie_rated_r.pdfIn PDF document text
    • http://fobezevuwoki.iblogger.org/5th_grade_go_math_textbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fe3ab27abdd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6009b20a4fcde.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/gqhhugd/voice_recorder_program_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/fG3hizy/98280828617.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/fqHAjjn/oxygen_levels_covid_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/ighdiga/hey_clay_birds_apk.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/sowewazulejewi/a_raisin_in_the_sun_movie_2008_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/dinanigujajub.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/kellogg_one_year_mba_employment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/what_are_the_ages_and_stages_of_child_development.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/experiencing_god_day_by_day_blackaby.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/unanswered_questions_funny.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/jufiduzatonanufosav.pdfIn PDF document text
    • http://rebobimakefeli.epizy.com/mewawulera.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_off00011c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 5588 bytes
SHA-256: b6480f69f10d129433b889ffba551648aca12f7c24ea30cf772dcac0cde42f45
font_01_sfnt_off00012f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F42 11540 bytes
SHA-256: 8cf65bce80398c096d55e71b7389aa6c395d3423a0c7dc1fa8ced665a9c8518a

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