Malicious PDF — malware analysis report

Static analysis result for SHA-256 95068261908d471d…

MALICIOUS

PDF

79.6 KB Created: 2021-07-17 12:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e93ad8353fba5c541bec9ec611ebb843 SHA-1: 8223d78894911a4c424c54ae1e4f12d6a3eb7324 SHA-256: 95068261908d471d33cbbd1a653ec7bcec042091363b2bbf76385855b1c7fe91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for a phishing trojan. It contains a link farm hosted on a compromised WordPress site, suggesting an attempt to distribute malware or phish users. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5984

Heuristics 5

  • 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.
  • 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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6bd4e0ea0---zikexubosuwu.pdf In PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/12155563615.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/24841265970.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/rufomozexevije.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/r9o1dfov03bgp3of580hqhpde0/misadinajizefavamuwiduw.pdfIn PDF document text
    • http://short-story.ru/upload/file/bitugirazawafap.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d53cd0c29---86233472228.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/pirelimekewatovetos.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/71453483222.pdfIn PDF document text
    • http://tele-video.ru/upload/files/zitopijapozaweku.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096348cc9281---mubexowoj.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/ef753679224dbdcd846b461dff328712/dexobixokevosomozukumop.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/nfprl1j9ng0v7isendu1rqm4o2/nofofovumeve.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/migapexofiniwezelesek.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/giriv.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/81539820366.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f0d927d09---13185981931.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/gaposa.pdfIn PDF document text
    • https://andrejc.si/files/file/zukaliviborikubepug.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/83103861330.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/xupudejo.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210606172831_nvi2ea.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///zizudebidevexanen.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/rejasudesanulodap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bill+gates+site+for+free+booksPDF 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_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 10568 bytes
SHA-256: 00890d5f204c556bddf7609d681baa2df9e82e08a040614fa4c06ad2c31943e9
font_01_sfnt_off0001140c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140C 17224 bytes
SHA-256: 63ca28a003dee00d793a33de74f760ce988a81fb31f179fe7d3017907f7fd80a