Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64378da1acbf9b8…

MALICIOUS

PDF

79.6 KB Created: 2021-07-06 23:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 45238e272fb95ed6a476527df9c99e99 SHA-1: b54e92cb0fa872de89addd84dd0df819bb759ec8 SHA-256: d64378da1acbf9b8cf0d7bc7c6a91048a583c8440e63a561c0acc36ed56a8382
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to host malicious content or redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6728

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3d3bb929648765465ab72ced3271673c/11514004122.pdf In PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b58e3439f2a---37038999329.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d014d9d7---39987248163.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/fivewajatafivenonosit.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b0d1c9569---76021979913.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7909ede4---2425629076.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/67787414158.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/puco05ptqap1vahe5c7hjlbc44/sipubupuragejevogoliki.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e4a221fbb---98638613925.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/nsat5f38iumh4ct8ed1mocdlm8/23338775276.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/416f8d8076b05156dfc61e03c791e6fd/butopudasukibetivapoku.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090caad6d791---37759148960.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/tukezaketegodesabuwe.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/gomejukorogutivariv.pdfIn PDF document text
    • http://naucseto.cz/storage/64094876834.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/kafijo.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc965c094f---folokujov.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/76c6f43b18771cacb200cbb3181b5119/87196441033.pdfIn PDF document text
    • https://actor-conseil.com/files/file/wekilaxififogigisiwobin.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/36a2077d5d4b1268fce75fd17ea12411/8467868746.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37bc99de2---tazupavefufot.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/b3atgthm6mk7lemcbvhfa9h3g1/xozidaxovejafarajesabuw.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/zowitabemofojogisuxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=flash+game+the+visitorPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 16724 bytes
SHA-256: 4f0a51f00a47f4ab1e9a425c5bdc83bb08228cabeae7839f6bf3edfa590a7730