Malicious PDF — malware analysis report

Static analysis result for SHA-256 5200ba6549d444e7…

MALICIOUS

PDF

76.9 KB Created: 2021-03-18 11:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8c2042a7fd28698d0de264f7bd5b3eb SHA-1: a2ba0ea4041ce2b692dd222ca70f0890adc92f82 SHA-256: 5200ba6549d444e7452c8e19c74694b2bf111b61845cad665f4606749c544486
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'xezojetit.ru', which is likely used to deliver a secondary payload or conduct phishing. 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://xezojetit.ru/wix?keyword=happy+new+year+religious+wishes
    • https://cdn.sqhk.co/zanemulazif/hihhj8C/52514685773.pdf
    • https://cdn.sqhk.co/numavagoko/gcWhgWE/mlb_playoffs_tv_schedule_canada.pdf
    • https://cdn.sqhk.co/movumatoz/iheCHgd/knightfall_arkham_knight_ending.pdf
    • http://mosquito.codes/79744938150tlp8a.pdf
    • https://cdn.sqhk.co/lasijutag/cVjjOGv/personalised_iron_bottle_opener_uk.pdf
    • http://passive-income.ru/foxit_reader_download_filehippo0d2eu.pdf
    • https://cdn.sqhk.co/molavagew/igerk4l/pimunijizezaze.pdf
    • http://morj.space/desexepugokikosotopiloedoyo.pdf
    • http://xitodefigatefuj.medianewsonline.com/39134919556.pdf
    • http://povoponikevave.iblogger.org/lejabimafotada.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gezizefefififa/more_than_and_less_than_symbols_worksheet.pdf
    • https://s3.amazonaws.com/dozore/76574314111.pdf
    • http://zonatitusajobo.onlinewebshop.net/lururewijigarixalajix.pdf
    • http://pejonoma.epizy.com/faxosalejafekap.pdf
    • https://s3.amazonaws.com/pulavokaxe/momefinotesatukilejujera.pdf
    • http://puwadokemizogu.epizy.com/case_files_internal_medicine_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d4.bin
a91ef2a47ce67651a8d8a7b255d643ad9985b21951ed294a579eecc1b02d383f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 5236 bytes
font_01_sfnt_off000103b8.bin
8eda156729020ee512a043472ff9919af10c2c3b4661bb35af728c16d42a98af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 10400 bytes

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