Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c29ffabb4677bcb…

MALICIOUS

PDF

59.5 KB Created: 2021-09-22 09:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e962547a5185bbccd8b297b57ea94683 SHA-1: e1a1225e7e4a0496b93543fd668892a06687efb0 SHA-256: 0c29ffabb4677bcb14caf12e3e1c901ae17302c9c7e8dcf5a984dd35bcbedc98
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file that exhibits characteristics of a phishing and trojan distribution. It contains numerous external URIs, many of which point to disposable hosting and are part of a link farm, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. The primary IOC is the IP address literal URL, which is likely the direct host of the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://hoangminhphatkorea.com/webroot/img/files/34860550132.pdf In PDF document text
    • https://yoimart.com/upload/file/20210903084850.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/nijefukiva.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210904085800.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210903035231.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/pidifekiwumiri.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/49785260059.pdfIn PDF document text
    • http://geose.ru/userfiles/file/piwaki.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f01bd7d0305bf7edbbb281058123286a/bobarob.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/13450658215.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/jutaw.pdfPDF link annotation
    • http://usateatop.com/_upload/files/tusidipa.pdfIn PDF document text
    • https://kaimano.it/file/givurutive.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/sovulawo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613efd6a56591---89641979431.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/jomaweruru.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/63519915438.pdfIn PDF document text
    • http://skupka23.ru/upload/m/50430311602.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/47401180222.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/bumulive.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/jixadipegimulojuge.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/vixufozigup.pdfIn PDF document text
    • http://contua.org/userfiles/file/fifezanitukuzafagukob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+themes+apk+downloadsPDF link annotation

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