Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2c6a32c6fae095…

MALICIOUS

PDF

55.2 KB Created: 2021-09-16 01:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b0499093fd930e1195c1e5396f2de96b SHA-1: dad0750ee17b8144bf338e7c7e24fb8fb98cf2a6 SHA-256: 5d2c6a32c6fae0954251360024199e267ed7b4f5f25254c3f9b703e2b25732a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6108

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
  • 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.
  • 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://www.ruchya.com.tw/upload/files/17419463645.pdf In PDF document text
    • http://unityproductions.com/upload/files/85198817689.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210913051019.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/kekuwiz.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/sotafilamixebuzoditamiw.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/xatapukuwakijinuvo.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/45384519895.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ac4d2d71---97219847252.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/nojukigudezod.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/141221394959.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/guduf.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/furojawujedisu.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/sifafaxu.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/46686257524.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/49008105724.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/67366002828.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/nutut.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/nufunezebod.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/34cd6ecb4a6f603a50901ce557e76022/62081968275.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/berifimijo.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/pokum.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/6108033a7b241902552bcf7f05b664ea/98192750909.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/dalagokotedalufeparuso.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/gizejilexoxuz.pdfIn PDF document text
    • http://elskenecologie.nl/files/64474021951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+turn+on+phone+without+power+button+and+volume+buttonPDF link annotation

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