Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ba203e3c9a657f…

MALICIOUS

PDF

70.3 KB Created: 2021-07-19 04:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48ba7d85ff5e46c730bee5964d7a3a8a SHA-1: 14d321b18b726b8ff7a0ab854e1401a059324633 SHA-256: 55ba203e3c9a657f1f9fe27a72c46257ee49b0458c7c2888c7c7c39987785c19
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The embedded JavaScript likely facilitates the redirection or exploitation, while the link farm on potentially disposable hosting increases the likelihood of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4718

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://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160926dfd3bdce---vaxifafuwebajoruwejikuva.pdf In PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608994b36dc6c---wimugenebimumawulax.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd7847c1c2---jimurofoludixamafot.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/posekuku.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba75241088f---41145921325.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aad6bf04e16---venazufitamafeviwetotoj.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/16025835319.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/feresetubabefurepawaba.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/25004149870.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16097d10da1a4f---57727511411.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1a767371c---xunerimexodof.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/27f95f85fcafcdefb9118978cc0215fc/fazojis.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/keripisirepajapinuwu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d38e6c445---sifeke.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/68903765078.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b871bcf39---xekifulogusubax.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/571c1c9d16083f144d486c1e2d2ba9f6/11181557208.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f708d2075---10616424895.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608666099ce4a---43939723872.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609212f1ef938---wawudurudas.pdfIn PDF document text
    • http://soles2walk.cz/data/file/pibelozupugiwuzojidunewot.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/37338094270.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/46855501649.pdfIn PDF document text
    • http://klefmarken.se/upload/file/sefunaxedavareb.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/wamobelobevi.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4514f3ca0---vivisivitamer.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/24005476869.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=makban+geothermal+power+complexPDF 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_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 17372 bytes
SHA-256: 3b391409f83fe11a9c932a289f07199f13708a673cae1a7ecb9e87cabb1683df

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