Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a5fbc7ea61d7c6…

MALICIOUS

PDF

65.1 KB Created: 2021-09-13 19:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: da4c48c3d1bae11d1a146adaa19a0220 SHA-1: efdbb0f2ca8f0dc9cfea6870e822299cdc261295 SHA-256: e0a5fbc7ea61d7c6bb6501ab02f153f05c298cff51573e9dde21ecf82dd0cbef
124 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous domains, many of which appear to be disposable. The presence of multiple embedded URLs, many pointing to obscure or potentially malicious domains, supports the phishing and scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

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://kientrucphatloc.com/upload/files/pigoweletozoxuxogiwu.pdf In PDF document text
    • https://o-dance.com/upload/files/fovidixusota.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/lebaliziji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613095236c1a4---48542251739.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/27771563045.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/33428751156.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613226e243aee---dijemo.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/97769849508.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/38117602401.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/xowupanokukij.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/58874637504.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/fatanuxutewefakudoj.pdfIn PDF document text
    • http://24x7taazasamachar.com/assets/ckfinder/core/connector/php/uploads/files/4705166244.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/a6c4de349b941248fd1ba6ac6b97a3cd.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/12539205992.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/71105832257.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/20886398117.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/43379569993.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/vegixipixotejat.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/dotajulapop.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/gowuwofivefetisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+retrieve+lost+contacts+on+android+phonePDF 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_off0000d456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD456 10756 bytes
SHA-256: 34046b32ccece8a38e5ca4f491b6620950b78f1a1dac7143dbf7ebe2dbe75df8

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