Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb170bf75074cd7d…

MALICIOUS

PDF

61.4 KB Created: 2021-09-09 18:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e9617edde4074b1b92a5122c0f57f8fd SHA-1: 924778f8f5da03ddcd073bf45d9945d02086bcc1 SHA-256: cb170bf75074cd7d84545fb53c702da12b595750c93ab5e5d10ec29cfbe86d7a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the true destination. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

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://xn--j1aii.su/userfiles/file/vubixuwevog.pdf In PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/65579432721.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/66479321824.pdfIn PDF document text
    • https://aaaxxion.info/images/file/33053116560.pdfIn PDF document text
    • https://siliconautomation.com/userfiles/file/jowovepikaxunebav.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/fulevasivetonuwoxesube.pdfIn PDF document text
    • http://tnhmc.com/userfiles/file/mofiwumoxofo.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/mekixolevog.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/26142812831.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/55250624968.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/73610395498.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613120600be9e---bafid.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/92357341659.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/sewonujikusijenawikuguwek.pdfIn PDF document text
    • https://hse.tw/upload/file/wiriwamovamo.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161312bae0a79f---41984709435.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/lanunarapubasepusoxenivo.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/wefizak.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/99324422611.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/57554968328.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/dixepitipowevix.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/zubusoperade.pdfIn PDF document text
    • http://fnathservices.com/upload/file/vunoxerowidiraguwi.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/60132198561.pdfIn PDF document text
    • https://mauspro.net/upload/files/papaxafifemaguxiwaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=can+i+send+photos+from+android+to+iphone+via+bluetoothPDF link annotation

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