Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2cc15292d4abe4…

MALICIOUS

PDF

62.4 KB Created: 2021-09-16 19:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fde19b5fcc90e274a9d71a6cf545322 SHA-1: 6f4604984cff989a0e6e5a073190fadb99024d4d SHA-256: eb2cc15292d4abe4ff6e7a42638bc1f09291f461105cd29fe07cd345c3570162
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The PDF also functions as a link farm, pointing to numerous URLs hosted on various domains, many of which are suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://uspeh-kursk.ru/ckfinder/userfiles/files/weditenaluzelotuwef.pdf
    • https://dom4m.by/userfiles/files/teweduvoxuzemo.pdf
    • http://agrocare.hu/ckfinder/userfiles/files/lowakedavijeva.pdf
    • http://meuseguro.top/fotosempresa/files/208841379.pdf
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/11792766415.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/legaxuxojiv.pdf
    • http://travel-door.com/userfiles/file/safigewonufujene.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0943de14666a15c22bc0ab958336c1e6/jomagikitopepedum.pdf
    • http://greenglobepms.com/uploads/xetirotaw.pdf
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/53601926.pdf
    • http://dekobonner.de/userfiles/file/54783761039.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/51988873839.pdf
    • http://cn-daomeng.com/upload/userfiles/files/666fd1db2e8faaead2da6205b0e7784c.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df26ed4922---dubazisititeji.pdf
    • https://serviceservice.eu/userfiles/file/26466338210.pdf
    • http://rabotatver.ru/userfiles/admin/gawulilekukugesegufumezop.pdf
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/11274845852.pdf
    • http://mueblesdepladur.es/1/userfiles/file/86654081572.pdf
    • https://mamap.in/ci/userfiles/files/61922366712.pdf
    • http://pileshoppen.dk/userfiles/file/rodofemopig.pdf
    • http://skupka23.ru/upload/m/57097840523.pdf
    • http://yuanyoujie.vip/userfiles/file/7544527326.pdf
    • https://cncostruzioni.com/userfiles/file/8589006492.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/bizabeboj.pdf
    • https://evrenmentese.com/upload/ckfinder/files/zidono.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=war+wings+apk
    • 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_off0000b344.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB344 16792 bytes
font_01_sfnt_off0000cb56.bin
c56352527cb06d9922f9e540eab820b1953673abb25d17ffacd7572263e16a94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB56 16648 bytes

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