Malicious PDF — malware analysis report

Static analysis result for SHA-256 4093ca6f6d9db532…

MALICIOUS

PDF

48.0 KB Created: 2021-09-19 13:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 36f6e05766927638653bf09dbed78b72 SHA-1: fbe3265bce19726e752ec5e5899047d18af712f7 SHA-256: 4093ca6f6d9db532f0a277e17be22f0960f4d1aaa6f36f0038fe04b1299d86f0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple external URLs, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the final destination or leverage trusted domains. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=index+of+pretty+little+liars+season+1 PDF link annotation
    • http://d2dgroup.net/upload/files/50575602462.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/fugata.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/4156076771.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/fgt0eoe09bloq4tq99mtfsll23/52054717950.pdfIn PDF document text
    • http://hairfibers24.com/upload/file/19748984841.pdfIn PDF document text
    • http://longtra.vn/userfiles/file/xogifivebixamemulif.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109180019524497.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/42555959013.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-3/20210903134525821274.pdfIn PDF document text
    • http://exosushi.com/uploads/files/92996672843.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/31963701657.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ch3b6i17m0b0iqc2lqrm5d50ni/niwusoniwelul.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161366019f3e0c---vawurinefopirufowiz.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/243bd5f241280061e9f26b3c023d14c4/pumalevosemufeforu.pdfIn PDF document text
    • http://retailcop.ca/files/64483049682.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/47471578253.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/71713894030.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/98140413351.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/ludejutuzu.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/jasizivifakuputatafodoz.pdfIn PDF document text
    • http://www.moyekolodin.com/files/daperesepuvar.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///11090929241.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/21192111441.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/9261020382.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/nanusuguduruzoguvasi.pdfIn PDF document text

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