Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64f10dfd3ec3ccf…

MALICIOUS

PDF

132.9 KB Created: 2021-02-21 16:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b1c291944ef558f302446f3e717fdddf SHA-1: 15c09fa62fb3143e89b9c76ba37a8d908b5bbfa8 SHA-256: e64f10dfd3ec3ccf8f837fcd6078b115770fd19e334c03f8cbe3d15f70812e51
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a technical topic, which is a common lure for malicious documents. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=how+to+disassemble+shark+steam+mop+s1000 PDF link annotation
    • http://1yamal.space/lujuwaxonowk2o8.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/1iggiLe/nixefokitujolekobigix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468253/normal_5fd1626138584.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/cF0sgc8/galaxy_defenders_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487416/normal_6015693494f25.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/fBrFPhf/gevadigasilefij.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/iaU3xha/www._underground_weather._com_livermore_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/ePGjb3S/strategic_human_resource_management_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/icJcVgA/26820292085.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/Tjbbjah/dan_the_manapua_man.pdfIn PDF document text
    • http://service-hire.com/vaxofi34ess.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/Jhhihje/zonefejisipag.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/jaNgch2/86630112654.pdfIn PDF document text
    • http://casbah2point0.com/rolufumerolakume1cilh.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/2gfibC5/82597237376.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/jhgiDMw/9892198074.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/sefiwegegagu/financial_analysis_example_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/assembly_language_8086.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/6221853442.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/bopufafudujo.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/aftermath_1994_parents_guide.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_off0001c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C95A 5648 bytes
SHA-256: 74593004a3d090f812de39d539b76b21a6de490bd0b2ce4a6a0a00847ce326f7
font_01_sfnt_off0001dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC6B 12404 bytes
SHA-256: ebde68291eec0f0e25b1864bb9420389b8a584eb70819cb25c571e8bcd071368

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