Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a6af4ef2fffb2a…

MALICIOUS

PDF

69.3 KB Created: 2021-09-18 10:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: f9c514741d61a218c31318be157ba2ce SHA-1: 06212bd938bcd4a37f86889da8e12ad88fc71421 SHA-256: 22a6af4ef2fffb2a5c2e0f137762950e679eaf36c9edda4969b5834031c08fa9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. Static analysis revealed numerous embedded URLs, with one heuristic specifically flagging the PDF as a link farm on disposable hosting. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the PDF structure itself is leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4679

Heuristics 4

  • 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.
  • 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://archism.ru/uplcv?utm_term=quite+quiet+and+quit PDF link annotation
    • http://polaryachtmanufactory.com/res/wysiwyg/file/gakugoxapemaxokevuvid.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/40756481166.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/61315092878.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/mekoperi.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/bufokojujizagaxonaxa.pdfIn PDF document text
    • http://carbontuning.ru/file/pawawojuxewevetejir.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/45516611041.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/21945421806.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/jomogigonuwanux.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/39209866069.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210904_0DCF5F3E1C756A1B.pdfIn PDF document text
    • http://mauthietkedep.info/upload/files/99677001505.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/3296759295.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/zotoxoratolukalufovinun.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/wuweki.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/banukomemukenobupusufam.pdfIn PDF document text
    • https://sadex.pl/fck/file/nanenidipawadinenix.pdfIn PDF document text
    • http://abnicum.ru/files/file/99510213919.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/xavubegodolukozof.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-16/20210916025713998596.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/61070404118.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/78908778659.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/62874318011.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/48015921776.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/digazidalaxajokinolewesij.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/22625511037.pdfIn PDF document text

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