Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf5d5a9844d4a71…

MALICIOUS

PDF

65.6 KB Created: 2021-09-24 19:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e24685f2106d76ea9579d97dc8f20e2a SHA-1: a4dcee87d5d6937cee7d0dd86a882fab192aa128 SHA-256: 6bf5d5a9844d4a71c2bc3ae8b2abdf8fef807f672638f8283fa4222953e16cbe
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it functions as a link farm. The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable or low-reputation, suggesting a phishing or malware distribution scheme. The primary attack pattern involves tricking users into clicking these links, which likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7498

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://sunpower.lv/ckfinder/userfiles/files/75131935762.pdf
    • http://www.siposferenc.hu/html/suzebefuzubaduwezow.pdf
    • http://dralituncer.net/userfiles/file/kupifir.pdf
    • http://tribo.kz/userfiles/File/15820936856.pdf
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/64674584240.pdf
    • http://thegioimaychaybo.com/app/webroot/uploads/files/vegutopuraxabusamimumesed.pdf
    • http://tubesealer.com/uploaded/file/343002624613a612e8bc31.pdf
    • http://sartor.ru/upload/files/84790432406.pdf
    • http://molenat-energies.fr/molenat.com/images/editor/file/bimanijoxezadigo.pdf
    • http://www.astmalek.cz/obrazky/file/31329184323.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614de0597846a---gifesonolubisojikare.pdf
    • https://webkapper.nl/ckfinder/userfiles/files/mezutab.pdf
    • http://daltan.hu/userfiles/file/xedupaketoxosoronizojo.pdf
    • https://junona.manyel.website/images/uploads/medium/35113656193.pdf
    • https://arrayamed.com/userfiles/file/lizidusugoweponerik.pdf
    • http://mp-journal.com/media/file/koxasigukeva.pdf
    • http://keralabiblesociety.com/fck_uploads/file/20325434593.pdf
    • https://kaptenhoki.net/contents/files/94511802022.pdf
    • http://designbyjoseph.com/uploads/File/18184195007.pdf
    • http://oecschool.com/userfiles/file/muzaralorepibeganul.pdf
    • http://getwealthythisyear.com/ckfinder/userfiles/files/58189285356.pdf
    • https://hanyauntuktesting.com/contents/files/kofato.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/930f486769caade9d36069e52b201613/gejixazeped.pdf
    • http://fotofolliasanlazzaro.it/userfiles/files/gonogejevuweloge.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+bluetooth+data+from+one+phone+to+another
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c421.bin
b788b78968d58da15c748c8645197167f7403903b5058624beeae9abf62ee1b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC421 10820 bytes
font_01_sfnt_off0000dcaf.bin
a4004029ff1e3ead1867e9a98b70d591e5b484dd6e2d926d9c7661a9fdf7bef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 19404 bytes

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