Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67548914ab3116f…

MALICIOUS

PDF

103.0 KB Created: 2021-03-21 06:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad7d8c72767a485508ff007fbf100595 SHA-1: 266bb8a7186ad36e4f4a86e44e20ab07d39d1546 SHA-256: c67548914ab3116f0cb91ce52f371b79b5d57572d73cb4b76e7183bd1b572290
104 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, masquerading as a document related to child development. ClamAV detection and ML classification strongly indicate malicious intent. The presence of a download button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=child+development+and+pedagogy+pdf+in+bengali
    • http://masuxuxu.iblogger.org/baby_trend_navigator_double_jogger_stroller_replacement_parts.pdf
    • https://cdn-cms.f-static.net/uploads/4499329/normal_6020bc6319973.pdf
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6042c3fea08d0.pdf
    • https://cdn-cms.f-static.net/uploads/4403422/normal_604ac781042fe.pdf
    • https://cdn-cms.f-static.net/uploads/4462036/normal_600e5a092380c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://biburusig.myartsonline.com/bncc_educao_infantil_2020_em.pdf
    • https://uploads.strikinglycdn.com/files/fd539a3a-c223-4e47-9464-f06d256a0892/derecho_romano_ii_libro.pdf
    • http://zujakogi.onlinewebshop.net/comprehensive_biology_practical_book_for_class_12.pdf
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_664ed5a1e1554e2c9112f35bdfcc772d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2eee5e2d-6262-435c-8fe9-3312d1ba9308/69106329950.pdf
    • https://uploads.strikinglycdn.com/files/a43602cf-b3f5-4d52-bafb-e8c16213ce5c/jugaditos.pdf
    • https://s3.amazonaws.com/wuxupewu/video_er_app_chromebook.pdf
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_d9768fbadfe94536b01c6891a77255f0.pdf?index=true
    • https://s3.amazonaws.com/fowikorejodi/what_is_the_most_ugliest_country_in_the_world.pdf
    • https://uploads.strikinglycdn.com/files/4ee40a04-eb47-4100-a7cd-8d7f6355fd9f/89138097312.pdf
    • http://pepiretivixu.epizy.com/chain_rule_word_problems_worksheet.pdf
    • http://gusozafameximi.epizy.com/91358412391.pdf
    • https://s3.amazonaws.com/purawuma/11984469946.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100bc.bin
b392846705501fc660387a24b7c499c7082ba2fc27dbe9edb8c3fa9ecf890591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100BC 5388 bytes
font_01_sfnt_off000112f4.bin
62d2a32b38319fb39258ea23e0746a4f4cb154cbaa9128964d240239bc34e4e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F4 23132 bytes
font_02_sfnt_off000153a8.bin
fbb29d40f06cb79232db9f3c9c7fb0c5a813ce8ed78eacd36b98db2e732fdc48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153A8 10780 bytes
font_03_sfnt_off000178a1.bin
9b0f18874c0fa9bd79ebc605cc1571b366717ea9a13669674d45c240eb82e625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178A1 16124 bytes

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