Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac97f56a0122549…

MALICIOUS

PDF

78.8 KB Created: 2021-03-18 09:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dd1a5fe38e17b23da60ed7fa752495c1 SHA-1: 56cf618b0415de6c544e8a577a1f46b8fd6222ee SHA-256: 9ac97f56a0122549029a2cc732d4510e3a187175c15669023c9dfb6d1043a1a1
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download further malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://dugedepap.ru/123?utm_term=biochemical+tests+principles+and+protocols+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5fe6cb9b9f012.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/jhcvHHP/flame_hero_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459464/normal_5ff9c51aa1faa.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/1MCHLRP/bling_phone_case_galaxy_grand_prime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443799/normal_5fcc44f86f1ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_6024a94530bc2.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/las_batallas_en_el_desierto_personajes_secundarios.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/abundance_peter_diamandis_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_602fd9eb21cd4.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/rimejiguvif/cambiar_archivo_a_word_en_linea.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/powologudonugiv.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/aggregate_planning_and_master_production_scheduling.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/2000649536.pdfIn PDF document text
    • http://rokefobititu.epizy.com/46305931769.pdfIn PDF document text
    • http://wasomozonomevam.rf.gd/certificate_of_completion_for_ojt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/critical_path_analysis_powerpoint_template.pdfIn PDF document text
    • http://sidunutisa.epizy.com/lepunawij.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/corrugated_zinc_sheet_supplier_singapore.pdfIn PDF document text
    • http://povosiz.epizy.com/79316460455.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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 5444 bytes
SHA-256: efa38545a644aea9f91d5532cb39505609521edb466ed74c69026e24766332da
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 11668 bytes
SHA-256: ced5e7eebdef12496d8b59ea32c590d8f2a5f99766dd273caa2304635ac0dea0

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