Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ed694efe33ff25…

MALICIOUS

PDF

65.1 KB Created: 2021-08-16 10:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bbc28314c57701813acf1cfac4c29280 SHA-1: 9c4446ca4572f3a0ed82160a7e7d8014f23c7ddb SHA-256: 24ed694efe33ff2525a59f77d5f151a6676fb11b007b2553c53d9fd80c036266
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The presence of a link farm pointing to multiple disposable hosting sites and compromised CMS uploads suggests an attempt to obscure the final destination and evade detection. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6699

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 http://softtox.com/new/userfiles/file/22909680082.pdf In PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/a245add4fd641e6b7ae969fab62a6a12/zobuwefakuve.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/llhbqce3sk7b4gto27rfpf3u8m/76115304576.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/93878341316.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/dokoropoge.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e93ac0a23a---54069715775.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086966d1df30---45954114763.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/62615848559.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d4f1d803---fojegug.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/tesanarotozoxuvawifusata.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd270b5cc---68512688271.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/b4180180b0928ae62364fe754af969a3/kuginikus.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69f40559f---63243648738.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/78117461857.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/17653584543.pdfIn PDF document text
    • http://azizolace.cz/images/file/69553288037.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16079881f216b8---rigimiwokuvesomifubagiwi.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/fixazowireresir.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/23445468363.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ae896a3c2---fenixotigezo.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/suxulanujideboruri.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bec0d4ebda3---47499114497.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/totaze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=application+for+warison+certificate+in+bengali+pdfPDF 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_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 16280 bytes
SHA-256: 51f7188fc0923d413df0f34c769a03691498283220a5942ec35947f68e4f38f7