Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfff83696675c8f4…

MALICIOUS

PDF

55.9 KB Created: 2021-09-20 10:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e71b5637ebf98efb28dacd313229fdb0 SHA-1: aaff0f5e119561a538d8e29cba9cfd2992f9e788 SHA-256: cfff83696675c8f41eee24fa94cc0d4ba5282f21c1786324e4424a36bd417141
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature. The primary purpose appears to be directing users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6236

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://bhk-aindling.de/userfiles/files/budipuvoximod.pdf In PDF document text
    • http://www.eatvirukai.lt/uploads/files/44360528241.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/wetusufosuge.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/19186632528.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/vodafewutuzanebaremewo.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/78337765547.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/jegedekemafopi.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/bawupofilij.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/af0382c4bf3b802bdcffd300c27e399d/dutukuf.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/toliwiw.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/fukulera.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/xotejesub.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/86133350519.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/68812626776.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/1a15edf64cb128e32553377c1f2e01d9/mexawokubabisejulebu.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/80252553477.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/kewilijeweditanurowizov.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/xibamuraluzorejutosu.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210907_51C53793E26B72A2.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5fa6ac480---tadefaj.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/wutijore.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210917005418.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/25663333949.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/zamefikan.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/zivawinotonetexozoziw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+secret+life+of+walter+mitty+streaming+itaPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.