Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdb130edcbc0182…

MALICIOUS

PDF

62.3 KB Created: 2021-09-13 02:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fc4aa2a37491bbf1a5d0a46fcdba1ef3 SHA-1: 9445bfc323331037e2bb4a1f90a7e01c69f64eb2 SHA-256: fcdb130edcbc01825d0d1bc1c712d3d52558691c6d2395cfdf2890f3a068a77b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

Heuristics 5

  • 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.
  • 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://www.buildonhope.org/file/53500326101.pdf In PDF document text
    • http://impressivetravelvietnam.com/upload/files/39757524634.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/midelus.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/10738526722.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/82940914327.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/90978321519.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/mawubelekot.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/gubefonag.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce278ad773---vibobemalomitagozizos.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/xifetujawi.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/nobezufi.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/vefubusepumorunemilasemar.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342f71d4c17---157827346.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/padodezejevi.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/sasamotilonogexewotuv.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b23ed10bd---16083985726.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/zurisimexodoxu.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/belikozasukiletinudora.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/tafojatasitejabegogupe.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/94274513841.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/88358532780.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/17174165627.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/rekegabibibomigo.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210901220926949502styvoi979gy6.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4737ef158c04cd93a0d622d83a7a6c51/jawebemunozikapuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=samsung+s10+vs+iphonePDF link annotation

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