Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ccc3c4980e0b4d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-19 15:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a7e80c2e25c617c3636aca12a17cde58 SHA-1: 30d88b1abcbac2405ffea0875b5a95c68a72e083 SHA-256: 67ccc3c4980e0b4da51f7b01fd7decc0623d4655b0eb66849f20d6c44a899117
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The presence of embedded JavaScript and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6362

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://getracemirates.com/userfiles/files/lovivafisajomomikuwu.pdf In PDF document text
    • http://casaatlantida.com/userfiles/file///39475063203.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/93782427924.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/mipesututozebatuxo.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/30932049247.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/getepiwasup.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/83971384812.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/56854000134.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/vofavijenakusow.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/zidif.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e7da2efd4---zapowixowebapuzabajegut.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137c35ac9cf6---zaladixat.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/48779498351.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8eckf5m1b0ls0p37a1q1msemp6/matedug.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/renugutixogu.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161365c52292d4---liselusawuj.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/ximefimofawumaxubogat.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/0no79ln9uco9jsjpip49hg22ej/10150585782.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/97698090985.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b88e6415ee---fovor.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/27465228950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ee+pay+as+you+go+0800+numbersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BF 11024 bytes
SHA-256: e3789c81152705044b2c0eb72b2edaa22e89c78a08668a8a28825c02360bc8e7
font_02_sfnt_off00011025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11025 17912 bytes
SHA-256: cf85932cb81e8dc380906cb999f5cc16d30b4213cd3bd8d3c28e35f5a6720291

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