Malicious PDF — malware analysis report

Static analysis result for SHA-256 39929189767c691a…

MALICIOUS

PDF

46.0 KB Created: 2021-09-20 12:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64ee64003540a441ac55dfc229d3bc45 SHA-1: 1bc9e16de9919c82e4f3a3be56a89d63a0b90730 SHA-256: 39929189767c691a3b77972954dc58c73b6979497a9c35ea122baeb7468d5ec9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution attempt. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7040

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 https://smidgel.ru/uplcv?utm_term=como+pasar+mis+fotos+de+android+a+mi+pc PDF link annotation
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/95304440023.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/gabakimekekumexiwonu.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202196830211036.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/82169041591.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/tipunepojubugebokavagaxit.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/tabitagunut.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/8779951711.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/2879871126.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28801b92fb127c3c26160391b58cbb5f/welezisogaduj.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/72094669712.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/poxijasawejevozexufaxunar.pdfIn PDF document text

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