Malicious PDF — malware analysis report

Static analysis result for SHA-256 52de23ae05415326…

MALICIOUS

PDF

75.9 KB Created: 2021-06-23 20:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fed4b602d3ccabd87da79be6b0f06847 SHA-1: 31f24e8f5c4847e054eee2945fa1059240837c1c SHA-256: 52de23ae05415326269edd8b42b128d3aee5d7ebd9bea1485b6ba8097247000a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. Although no scripts were explicitly extracted, the structure and URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8378

Heuristics 5

  • 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.
  • 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://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608550a601483---nidujax.pdf In PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/gitqc6au14hobv0udsvou56vh7/67313287947.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd90f53a13---vojefopedib.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/pejopugopuvorer.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/69lj13aiprj3v6c14q2vtsobfg/480433900.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c8adf0832---mukusuxupanowe.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/kovuxafevarareravax.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706aaab4199---sasemusolobavi.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/selulalizenanip.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/nemobavabebosegotadulota.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927d36ab1b5---gidizatadodijajuja.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3922444b17---22582812365.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/82753718672.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/budovirobopuf.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098366085889---24981516309.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/4sb16gu65t0ai2d17a7ipogd41/6393576327.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/xejitagezubiloxigifepofa.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/kajolefegevu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=install+winusb+in+ubuntuPDF link annotation

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