Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7a86b6ba552e25…

MALICIOUS

PDF

79.7 KB Created: 2021-07-18 04:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2144cca0da3555c427398cc36176e0fd SHA-1: 02cc6254196c2e4fa3d8270523e3390708267783 SHA-256: 6a7a86b6ba552e25a78f68afb7631e042a5282b0730b5b71eef61955ba610ad9
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment. The embedded JavaScript likely facilitates the redirection to these malicious or compromised URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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 https://spiuruguay.com/ckfinder/userfiles/files/dilefesakaku.pdf In PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/guwivovisetomewulixali.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/83941392416.pdfIn PDF document text
    • http://sooclose.eu/upload/File/98684287674.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/4r7h8cpg9l2e1e99fpii446nbr/velozovesimawupemez.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/82301605687.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/gg1p86uk3cli09fiudaqslvu53/69775528472.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc76aeefb3---kawiboripi.pdfIn PDF document text
    • http://moveo-sport.pl/userfiles/file/wixalezunomilirezutumup.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ea443efbdab6d67d9ffa88416fda4399/lujafodetatamemuzutoto.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/remimoxexilisuv.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/4r84a4blp8534gshk0mirjkp77/39174660419.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/6958121782.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/25899825611.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab271b8305---xiniririnekipozidadowinep.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/rulimobawadokizotuv.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/lusirivodapemokurase.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/427sec25n8sel9dmmec71hdfho/mapimolapurawoxigamekuba.pdfIn PDF document text
    • http://www.samlab.com.tr/wp-content/plugins/super-forms/uploads/php/files/dfa8r68rp5180g91ab51r8afgc/fixufapur.pdfIn PDF document text
    • http://bulmarconsult.com/files/vosigopugixir.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/jagapakisozemafa.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/xidikukopabivifeboxeto.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080ea1e01a06---59851323504.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/sukamozetisemubiribesaf.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/39207516039.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098475fb6d5e---49944674014.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=i+have+power+of+attorneyPDF 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_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 16588 bytes
SHA-256: 386c395802d5bf9716478d12efdac11ca8a12bb03c06341f531559bb9a3acddc
font_01_sfnt_off00011991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1