Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c188c54cbf62dce…

MALICIOUS

PDF

81.8 KB Created: 2021-03-24 02:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c5ad06b32de4c81da4d8dd232980fe6a SHA-1: 00fcda753f4ecc5d55f99b658b5cb835e2134c11 SHA-256: 6c188c54cbf62dce6ea95c502ea315535cbcf961d1b80fe0d0cab24d25213236
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain associated with tax-related keywords. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the embedded URL is the primary indicator of compromise, suggesting the document is a lure for a phishing or malware download 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://vilenefex.ru/wix?keyword=estimated+tax+payments+2020+irs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493198/normal_600b3c0d2f549.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/gexogojararu.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/9475539855724oaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_6003a6d42b387.pdfIn PDF document text
    • http://pet-guru.shop/what_size_battery_does_my_timex_watch_take5xg9g.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/muwemivumazulax/63783717082.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/what_would_cause_the_transmission_not_to_engage.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/29831973773.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/high_school_printable_book_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/18172875219.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/16730405637.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/7142074982.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/spiritualized_lazer_guided_melodies_t_shirt.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/fulodaxoxup.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/budgeting_spreadsheet_student.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/how_to_write_a_successful_character_arc.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/business_english_course_content.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_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 5476 bytes
SHA-256: ac6865f99c219ab8f622c21797fd043ad8a4eae40b4914b325e3597418bd00a8
font_01_sfnt_off00011316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 11476 bytes
SHA-256: 57530d54f5acc9f4de1179c23a34d83c0189c5a3b32756a46ab9bf15495c9d6f

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