Malicious PDF — malware analysis report

Static analysis result for SHA-256 0640e416de9724d5…

MALICIOUS

PDF

49.4 KB Created: 2021-10-06 03:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a0621f1da221314f480ed6e75b9c8c30 SHA-1: 4717d4354eb73b5872f82c5ec8a5915dd947f669 SHA-256: 0640e416de9724d5ac97d730a5d6d90a4c567cfdb58d9c5f63473a949977e752
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to PDF files on various domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to distribute phishing content or further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4952

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 http://okmarin.ru/userfiles/file/41297437435.pdf In PDF document text
    • http://abwalabamaave.com/uploads/files/jusisawa.pdfIn PDF document text
    • https://loctra.net/userfiles/file/fozuvesubugaxu.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/vuluxufalowu.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/36529699636.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/xirenusesixubewameduwidu.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/zamuwubilibukosesozidomiz.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/83649950131.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20211006_082712.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137873308902---6274260946.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/zoraxifotigedawilavefeka.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/244174460.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/jopuroforunesodemuv.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/94486479235.pdfIn PDF document text
    • https://kaowei.tw/image/files/20211003_080822.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/68735792586.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/varoxatizavavuxu.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/jaditomewobenaba.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/tamawiduxilapile.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8833423199e07c50c2f52f742aab1294/45685072324.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/28292637055.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/96242901378.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/66000109797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=every+exit+is+an+entry+somewhere+elsePDF link annotation

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