Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd6cc94f35c4843…

MALICIOUS

PDF

109.4 KB Created: 2021-07-19 01:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52380ae55f4846b13f3f6bb6447a66b0 SHA-1: 7accc13a89f271fe0d8776a70f74be3d23ee2171 SHA-256: dcd6cc94f35c4843cec5452da513f533abc4a0ed08c7a16d4f1eeffef194846f
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary goal appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8054

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 https://whiteplacard.com/UserFiles/file/risedewijudofijofofi.pdf In PDF document text
    • http://alexhoffordphotography.com/temp/files/file/zufopigepozimitu.pdfIn PDF document text
    • https://telenovella-bg.com/files/fabekulimezulak.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/44898835958.pdfIn PDF document text
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/ruloxaki.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106011203077132.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/86289353531.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/df7e46c524e9699317697c7b1f114998/55082256461.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608463990a3eb---sejigova.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8de77adc6---lisanitar.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9673b1401d9b4c2755896cb179b4b652/50754717494.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096df8fb975d---6592346538.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/e666809cf77b5c00f05c2369e4545aeb/76947956890.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/778ada7ce1967876328b92dc96da4e88/55281546309.pdfIn PDF document text
    • http://runo34.ru/attachments/file/gugasezufisa.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/91450030079.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/rorolozokolazuzipal.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/55749029188.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089543c77ff3---29386302422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=quotes+of+confucius+with+explanationPDF link annotation

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