Malicious PDF — malware analysis report

Static analysis result for SHA-256 b183140c79145467…

MALICIOUS

PDF

90.0 KB Created: 2021-09-07 16:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ccfebb4a8fe2377ff23eab007135b9d8 SHA-1: 17665afeb1d6d6668f806babeb87a1977b91dbd7 SHA-256: b183140c79145467698bdd5ce0968ddc58108cbc2c943c09014d8efc7205ab74
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5238

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://chcial.ru/uplcv?utm_term=rexx+tutorial+pdf PDF link annotation
    • http://udokutscher.de/gfx/userfiles/files/24212926189.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/9147684880.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8315cc551e6ca51aef89348f584ab32a/wakelofidipufagulofawumin.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/23825891221.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/fa9ed24af576b49e4b3dc9d6a3eb232d/55788959514.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/be648f20ce2e9828f9bf985b5aa0db13/7405207673.pdfIn PDF document text
    • http://novena99.com/uploads/files/202108181104005680.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096bb913bcc4---gavipomuwavafera.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc5cb8c3c---58130537559.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/76685634848.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/kedaxipat.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfb1ee0155---jedalemurisud.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/50528961791.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/50852263766.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/2084283581.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/pijosujegaxeguz.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/xawetoxezinomanexa.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c85181b8e04349cee24ded0bccc86b24/kifijamovalexuriguzeg.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3a416ef6---85477879557.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e226cc5b64d---51142048810.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c34ba79bf---sawakamemupefez.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095973b5f815---tisomesazajupotor.pdfIn PDF document text
    • http://proxima-design.cz/files/file/liwawiromarunugilurujazo.pdfIn PDF document text
    • https://banghenails.com/upload/file/17499803909.pdfIn PDF document text

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