Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e79d60601e29a2d…

MALICIOUS

PDF

41.5 KB Created: 2021-10-08 12:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 20c7d13cd6989392a2dc56f92fa595b7 SHA-1: 2133b67108a7785435bc559bce0f9fe91be910e3 SHA-256: 5e79d60601e29a2d1d205e4e457651c208754976c645bbb5ba6d716dc2fbef8b
174 Risk Score

Malware Insights

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

This PDF is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific intent beyond the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7634

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://zlzljc.com/uploadfile/file///2021090916382274.pdf In PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/18662125764.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/fohddd9sf03kunte2oknqjb9v0/vusixaxefanekem.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357a2f0c99a---kimosategifowukebobosebo.pdfIn PDF document text
    • http://inphilong.com/upload/files/lisuvidewuwepi.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/fibuwigigutaxugogugu.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/28398350313.pdfIn PDF document text
    • http://mamtaniketan.com/userfiles/file/mewujurebivak.pdfIn PDF document text
    • http://a899.net/userfiles/file/67334116741.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/ragowopumigozojotel.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/110423c818bdd17fe222ca4f6a33a28e/27971050813.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140bfbac303d---7563386171.pdfIn PDF document text
    • http://acelybio.com/upload/files/renulamaxurimepuromixeput.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/bofipebokofepodenesakajuz.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/44291873376.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/36928632442.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/zajogaperokodeb.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/34236995303.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/51767797135.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151f7cce1470---pufebafisilenokiz.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/doxasifibelejugaxafeb.pdfIn PDF document text
    • https://taperagi.com/contents/files/91481877463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+transfer+a+file+from+word+to+pdfPDF link annotation

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