Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f88d2ec69e880e7…

MALICIOUS

PDF

58.1 KB Created: 2021-09-18 12:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b9808b289de5f19bf4ad9ac374b4d178 SHA-1: 615eb31541aa88bca13e325fcacaebd52d2b3dea SHA-256: 3f88d2ec69e880e7609f3d090cccd684bdf7e9696d8123ba04a655550317a02f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=properties+of+acidic+solutions PDF link annotation
    • https://poulinstrapscan.com/userfiles/file/tudus.pdfIn PDF document text
    • http://newo.ru/files/files/nelanub.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/88403024113.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/fodozazokaxepu.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/98479248237.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/68989654865.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/detixamugenadevuwunojuvur.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/govigotufibomujuramoza.pdfIn PDF document text
    • http://domplus.su/userfiles/files/19755791730.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140f563168d8---82717213015.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/48356903976.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/51470744948.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/vowebevon.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/tomurigazenov.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/64559899737.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/sefoxatavufajojirubojebut.pdfIn PDF document text
    • https://amgaa.org/temp/files/dodimalakubokozagat.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/60310309496.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/bobijusokaberesiket.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/75359069209.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/gubaxugiramikaranipoma.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/98754397543.pdfIn PDF document text
    • https://afayl.com/userfiles/file/zuboruvosasetijawet.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/39747959271.pdfIn PDF document text