Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ecc201c3e7db6f…

MALICIOUS

PDF

71.4 KB Created: 2021-09-11 08:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6d0463ca9242c5898a3c0ce5ee60db83 SHA-1: 8c9ac1384bbe023ebe6f25fc1b2892a829c6e69f SHA-256: 36ecc201c3e7db6f8cadd127553fc5fbbbddacdba6bf3bb7acf817f6ba8f3f56
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute phishing content or malware. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7670

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gz-theoutfit.com/UploadFiles/FCKeditor/20210910160439.pdf In PDF document text
    • https://fallsplat.se/bildbank/file/16746892797.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/sejire.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/33675975796.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/nefevodu.pdfIn PDF document text
    • http://rc-modeller.se/images/file///20478469737.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/75477580990.pdfIn PDF document text
    • https://protum.se/file/87980498407.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/26574399093.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161393c6b9a6c5---46622003150.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210910225521.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/3587636005.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/99757278428.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/valazop.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/fogakixupomadawowizad.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/96741070046.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109021520312302.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/wenixumi.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134fd4c0fbdb---bizagejekelobexuwom.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/korisi.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/tasakexutuzavapuvulolus.pdfIn PDF document text
    • http://jin16888.com/userfiles/file/12524787444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pubg+update+ios+indiaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 10660 bytes
SHA-256: bddd4f3b37003cdaba61ffded796ef60d30e7aff8fefc6e067df8fe484cf30c9

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