Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff193f3ba9fd351e…

MALICIOUS

PDF

449.7 KB Created: 2021-05-23 00:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0ddea2981f4f7c64569653697bf0284e SHA-1: d5b904b919d9f38eded2f4c57321b809259d8fa3 SHA-256: ff193f3ba9fd351eea2076e7da787acf8a6a293f94884df475782d8026bdcfde
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The file is identified as malicious by ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The document body, though heavily obfuscated, indicates it's presented as 'Material para aplicar sisat 2019', a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier clean score 0.1115

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a452a765c280e3df32db659116f1ee49/wavuvusebiva.pdf In PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607893f52a600---22323735856.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/k9646uim3efqdpkr5v29ior53b/65128458700.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/26981faf03589f1409378efcf7209736/dilemofimegepas.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/65983536412.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5895c489a909c16e588b8e1aa65eae06/kexisukovekinuvojezub.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f3c98da4---dexebujewonigarames.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/04020acca84191da21e735c57b3f44ef/pimajopawawexujatele.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608862a2ef39c---42202386438.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/da65fd02e56a0b8efbc8f7186375b7c1/paviziwodubatig.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/38488066672.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/bh89hlt838hpcc4u95lkhaj1u6/22860146055.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946ad7e774f---tixipofuvizuvovibevawidok.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d0c216d5e940659b8af0cec4975477e1/pasoda.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3b68bfa8971264425c9f420ccada0b22/55403169012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=material+para+aplicar+sisat+2019PDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5c2bef8f066cd0180f8e7c29babccbe3/94916856838.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E94F 5416 bytes
SHA-256: 0fce91a5f544d56e241b826b9bfe864563fc0539372d2093373154a6775b25cf

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