Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bd8a786279fce0…

MALICIOUS

PDF

63.7 KB Created: 2021-11-05 00:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2c1f4bf33fe9d85d62059a9a3cfeeabd SHA-1: 9735e2daf2339d6fa76e2c94ebbefff06949fa71 SHA-256: 15bd8a786279fce09d1fb686151354cd7691fef9fcbce2b4988b206a8fca27f7
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The PDF contains numerous embedded URLs that form a link farm, with one URL specifically identified as a potential disposable hosting link. This suggests the document's primary purpose is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7696

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://versobrokers.eu/userfiles/files/xilagamit.pdf In PDF document text
    • http://www.dilipprabhavalkar.com/images/file/26290220105.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210907044233.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/rotibimonovu.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/zikekazowegililenoduji.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/07777t0f9s3s9plsdgjtjm9hig/99047500417.pdfIn PDF document text
    • http://veitali.com/upload/files/vorijugedexaxabulumoloku.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/69972011037.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/senonigififugilipinijumi.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/44061401687.pdfIn PDF document text
    • https://dasyueshan.org/userfiles/file/luvogevixujavod.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/josawupa.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/88570285850.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/xPAns0MRe5M/uplcv?utm_term=can+you+walk+on+a+torn+ligament+in+anklePDF link annotation

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