Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0d014af12d169b…

MALICIOUS

PDF

54.0 KB Created: 2021-09-17 01:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dce30c6e3e763d8ffc78eae8752e61df SHA-1: 0eb2eb40d1d593f06f4f91544bc36d84b8df3d2b SHA-256: 0f0d014af12d169b3ca35f616d8f0cb11e24ded33bcfe049d6053cf0db8abccd
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The embedded JavaScript likely downloads and executes a second-stage payload from one of the extracted URLs. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6821

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://wamaeassociates.com/images/uploads/originals/file/tugivuratafubikepuzadu.pdf In PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161410ce4955f6---95057091262.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/2605505008.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-14/20210914123845260008.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/11827332756.pdfIn PDF document text
    • http://aven.su/userfiles/file/kodapukogefariweputavi.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/34345421406.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/75729014676.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/dcjm9a9rtfulgmohh0rvak254c/78532560671.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/15077787656.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/7800333122.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/72439649009.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/23571219494.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/niruwirejexuwop.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/82501188700.pdfIn PDF document text
    • http://klaaswester.nl/img/file/wabeni.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/fibawirukalupoba.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/diwovomalasofobipipijug.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/gejasefakujujepopiwazasa.pdfIn PDF document text
    • https://bdata.vn/upload/files/libivo.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/90239803302.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=restore+deleted+files+from+phonePDF link annotation

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