Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33cc7562bdc37e1…

MALICIOUS

PDF

85.9 KB Created: 2021-07-27 17:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf6d5d4d5e7056776205d71d029cffa8 SHA-1: e7883c8b4c5de67936a44b0377a49164ba763530 SHA-256: b33cc7562bdc37e180194d7fda6f123109f57579a846a55a5e1cd9f608eb6c3a
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple websites, many of which are hosted on compromised CMS platforms. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to redirect users to phishing pages or download further malware. The presence of numerous links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4112

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 https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/p789mh62e2l3hghuafj35hati7/pewitejem.pdf
    • http://poorclarescork.ie/images/29612792133.pdf
    • http://bettekingproductions.com/clients/874300/File/61692954923.pdf
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/butil.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/3o09kvnsj332jgok35d1am3fov/nuloxan.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/zaxigagusonusixu.pdf
    • https://marbeyoyun.com/calisma2/files/uploads/rurajasojamunebomalu.pdf
    • http://goneviaggi.com/themes/userfiles//files/57656911527.pdf
    • https://net-mex.hu/ckfinder/userfiles/files/79814594978.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/jjjed4nm66ogl4qtkg26gj5ass/mapeneriwutizakonofixazol.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/iic4jfn7jf1qtacl06t4n6dhih/ravuririro.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/4a5d9a2d22e10b081f597e0a2a8d1584/27811712663.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/f149f0166c11cf431e990c39ab443e17/lopet.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/udofime5o1pfthjmv0iofvv8b6/pusijeganasavenepipaxonu.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/0c5f1397ad7da002202fe80b4f0cb18c/22366347457.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1bb8b0653---rapanawisipaduvamozazu.pdf
    • http://charivne.info/images/file/59029781455.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16079e67e7edc4---33997223749.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/66834c36c5d1cc984511e107e1f39af9/29377375887.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979acf0a8cd---85850724799.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/aa509c70b0488ce4f571f008349dd4e3/86607030825.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609771a9e6f0d---duwojepeguse.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+play+pai+sho
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7fa585b87---48829839904.pdf
    • 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_off0001089d.bin
e5f7ba3aefa7e5c953dea1544cf5904365f0181d824bf62b5269992637ae5a48
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 10204 bytes
font_01_sfnt_off00011fae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 16792 bytes