Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7c7f5893ad9e9b…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 00:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: f54ada8eed2b1f830f9dc388be08236d SHA-1: 90c4d8ebf0aa1c8bfc266710edc7b96d9fa650b1 SHA-256: cf7c7f5893ad9e9bd74f7e4134e1ed36547146b81d830c3c51448a8192078ba5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The file is detected as a PDF phishing trojan by ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The use of compromised upload directories on legitimate websites indicates a tactic to evade detection and leverage trusted domains.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

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
  • 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.
  • 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://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a707aa84598---94055734862.pdf In PDF document text
    • https://aathichudi.org/userfiles/file/bidamevi.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/17276401892.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d393f6508fa---xafelugemubenomaku.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606f58f2355ea---zopuxonus.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vro0n57d3l95o6n2f99mdve9qh/pusanuninar.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/n7k6ea64h7ath8uc81f9iu8ic7/36866420711.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078336e721b8---tajeduluwelazose.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/79228857937.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/sitigafilidedilulo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/8daeaa562b98d90a15226d2a3c420d34/80508516505.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100ae39503d6---vajijorirajekujigamukelud.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/vowotuzedijotobo.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/dspc69vd63tshvfb5ogio05b3j/napotapakunalenozosubovaj.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/rijufavapusavurujutod.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/81770245008.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef5e371e65---81520559792.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/vulemefawuvumozofatoni.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8c471c1fedc5ce2988a0364e9031222e/vemalari.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/derumipumiwomunolemisa.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c71a79359---42925263945.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/38899610755.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/98117652567.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/8510734911163f7e4962719c39316778/38342911941.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/lojatotifedugufawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=recommendation+letter+for+student+from+english+teacher+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 11212 bytes
SHA-256: c934194db312cb9fab5b3c4e890ab41d27f731153d5032e1874e336dd21e50fd
font_01_sfnt_off000126f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1