Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7748f922225472…

MALICIOUS

PDF

83.0 KB Created: 2021-04-28 14:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 39c28397a75eaf9ff88ccc771b1ef293 SHA-1: 2ad709f3ba978b9e58f9fc4f8bf465751b306823 SHA-256: cb7748f922225472c794ca96419ddf3699b9ca3159555a95f44c1cd3cd4b783f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be a lure for downloading a 'VBA macro tutorial PDF', which is a common social engineering tactic. The presence of this URL suggests the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=vba+macro+tutorial+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fd77f8daa842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_600bccef49997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_6049bdb3b40ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5fe791c656dc6.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/yNtjijf/33712317725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_60596968898a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fe63271917a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_6063b8858fd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_60527ad450cbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_5fe2a108146c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_606d94ce8f50a.pdfIn PDF document text
    • http://ladariduzaw.22web.org/core_animation_advanced_techniques.pdfIn PDF document text
    • http://muwawukiseka.iblogger.org/77653209997.pdfIn PDF document text
    • http://zomofovubowoto.iblogger.org/agenda_21_united_nations.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5fdeb94780261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424026/normal_5ff25412ae8e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498868/normal_5fdfcb4445fdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376629/normal_5fcf85dfb7ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_6017268723b2b.pdfIn PDF document text
    • https://cdn.sqhk.co/zegapoxasut/ifzhh4M/persian_outfit_assassin_s_creed_origins.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lubozudaxik.epizy.com/57189458371.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 5200 bytes
SHA-256: a29b4e147413db94101a825ffc68d9944650d77db258ed9c71a1f5e84099ee0e
font_01_sfnt_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 10984 bytes
SHA-256: ebf6fae39356bbea52de9b2bed341253be89f7ee66f5e503901e82df9722e389
font_02_sfnt_off00011a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A14 16480 bytes
SHA-256: 05342b72a9557e6ead188edd2d5187beec89c787825214f04b6697321043bc0f
font_03_sfnt_off0001301a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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