Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4aeda6533d8c3f…

MALICIOUS

PDF

71.3 KB Created: 2021-02-16 08:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0de758ff6e7f8e2c7f62fe78525fc5c1 SHA-1: dc7dada24ffb88571f8425237aee933811415cdb SHA-256: 4b4aeda6533d8c3f3bd5e786a52d7c5c8a262a3fea2a44d7a43f485134ce00cd
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, one of which is presented as a lure related to treadmill maintenance. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=how+to+replace+sole+treadmill+belt PDF link annotation
    • http://xinegibifupa.iblogger.org/cinema_4d_software_highly_compressed.pdfIn PDF document text
    • http://suxadasumuwim.iblogger.org/5600925760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_601f104248753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460251/normal_5fff22edbe6c0.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/jdicQjg/42858402162.pdfIn PDF document text
    • http://rikedenufag.iblogger.org/mijebuv.pdfIn PDF document text
    • http://duzatizej.iblogger.org/3663716950.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/joWEjaR/dr_dave_neurology_benson_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_6001b9e139de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421778/normal_5fcdc368d8d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_600122ef15ffb.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/HJajggh/chocolate_cupcake_recipes_without_baking_soda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_601ef1ec52025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462985/normal_5fe4149463476.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/Bif9dwv/homeschool_connections_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422638/normal_6001ee09f0978.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/tejuvonixag/rifimezaxafabik.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/total_audio_converter_software_free.pdfIn PDF document text
    • http://jofanemapax.epizy.com/jijotipume.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/action_sheet_controller_ionic_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/anderson_barony_barrabs.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_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 5412 bytes
SHA-256: 78a28c85febb027fca487239f580c4e046f597cb617caeed9e2abd7a873d11a5
font_01_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 10988 bytes
SHA-256: 3e40b0a15e991dfc5f07aca73947918cdf739c94990bf1d5e80cb466ae4b7b4f

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