Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34aeb59a8f3eaed…

MALICIOUS

PDF

91.6 KB Created: 2021-09-05 16:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cc73c60512af3fc00b5bf15c8cf20f4d SHA-1: 2e10e32b2dd1e5ef3ea6b733775e498ae6214b0a SHA-256: d34aeb59a8f3eaed1d0064bb7d094b0968c9ca2ce8454ec57411c6ea23c08591
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to potentially disposable domains, suggesting a link farm designed to host or redirect to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination of the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7598

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://tgtech-auto.com/userfiles/file/gegab.pdf In PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/jonefep.pdfIn PDF document text
    • http://casaalu.com/luutru/files/21450073186.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/81521488fba7ef6c4bd0e0cfca85c7f3/jabixukapevax.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/38012443434.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/lujojipepidazulajuvirexi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/jitb65b2u6fnp2hpcdn91gqap3/65328546804.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/43599324170.pdfIn PDF document text
    • https://csodamalom.hu/files/files/82752060326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=yamaha+psr+450+manualPDF link annotation

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