Malicious PDF — malware analysis report

Static analysis result for SHA-256 355abdc1547eb03c…

MALICIOUS

PDF

422.8 KB Created: 2021-03-14 15:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e5d5b1ab12c3904d4831bcf4985762b3 SHA-1: 270fb0de912b0d425cf90220840743ee25bed319 SHA-256: 355abdc1547eb03c4bb994e2ef0f71356f353281965c875b4ae7bf4e46cb6056
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to health information, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9338

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=dr+william+donald+kelley+one+answer+to+cancer+pdf In PDF document text
    • https://bonavipopugob.weebly.com/uploads/1/3/2/3/132302892/146c1ac1c73.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/AHhjk6H/23394189318.pdfIn PDF document text
    • http://gikisivota.iblogger.org/14092290826.pdfIn PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/punexawo.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/801e23.pdfIn PDF document text
    • https://fiwinibikevuli.weebly.com/uploads/1/3/5/3/135339450/6333011.pdfIn PDF document text
    • http://fiwuwoxas.22web.org/calendar_template_spreadsheet.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/xemalemin_kiviriwire_tupemiputujun_kiletavamo.pdfIn PDF document text
    • http://ziwixan.iblogger.org/tabuxebalaguranidutadu.pdfIn PDF document text
    • http://jozarizotugi.22web.org/schedule_a_itemized_deductions_worksheet_2017.pdfIn PDF document text
    • http://gavokofubafixi.getenjoyment.net/ncert_books_class_11_and_12_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/iauidt0/packard_bell_dot_s_drivers_windows_7_starter.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/bgh6gjz/ark_survival_evolved_pc_server_for_ps4.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/22467383295.pdfIn PDF document text
    • http://vujenixuwo.mypressonline.com/tofajilar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_892aa0d31415487d89e9e2d43eb741a9.pdf?index=trueIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_d543a707d6604a32b6db10f81e6151be.pdf?index=trueIn PDF document text
    • http://sutuvufekejute.epizy.com/inventory_website_template_free.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_e9ca965d29e24d94bb7d2fa8c140aa98.pdf?index=trueIn PDF document text
    • http://vawerudarasikow.myartsonline.com/ponebujimuteduz.pdfIn PDF document text
    • http://supegawezokex.epizy.com/latest_couple_pic.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/32327748386.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_off00064bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BFC 5560 bytes
SHA-256: f912cabf6091137ccaa0b62e7bc2f6c5424bbd881acdf013cbac0f79d158f4bd
font_01_sfnt_off00065ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF0 12432 bytes
SHA-256: aa4a6238ca80a1831ac045f676e95e82401d63ba21cdac465b523cd5f533fb43

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