Malicious PDF — malware analysis report

Static analysis result for SHA-256 3585da04e17dd0c4…

MALICIOUS

PDF

77.2 KB Created: 2021-03-21 12:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 832bacc0f19ae019911d2451ec47cb2f SHA-1: 12f336d291c6cb38f411d47662aa9b5d5bee0b3e SHA-256: 3585da04e17dd0c4e12620323013d25b10e9d2a16eb37b8ff317cb9812141ebe
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of an external URI suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=how+to+create+forms+in+word+2007 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483346/normal_5fd14588645ae.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/7jagggi/south_african_biscuit_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/GugjBhh/wageworks_commuter_benefits_parking.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5fcaa44a5d5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_601c79a650399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ff25854996b0.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/n05kggN/muxakibagiwuzigegagimopa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450884/normal_5febeb21da54e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372987/normal_5ffbba7718e87.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/romejirapiti.pdfIn PDF document text
    • http://peteferix.mypressonline.com/vasozenodejozimunutezu.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/sap_mm_blueprint_document.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5ffaa12235e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486346/normal_603cea6b5b213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6053000199ba3.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/hXsjjhc/retusolijigakajegedew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_6038c4e30ade5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/boletin_informativo_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/how_to_do_a_chin_up_with_a_resistance_band.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/fexajulofebar.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/jufasuza.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_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 5540 bytes
SHA-256: ae99302132260d79b7c020ac3be241921a3c5cd98bc6aef37d8ec3724f55f910
font_01_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 10564 bytes
SHA-256: a7ecd300df119840b745875929a4c49e9fec22e0d7c545b78f9a792a0e9cd79e

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