Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e47485e79f3a3a6…

MALICIOUS

PDF

79.6 KB Created: 2021-09-19 00:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d4b08421ec0ec6802f387447e53157c0 SHA-1: 1b88e6a47691e32066978c93b29d05505d725722 SHA-256: 9e47485e79f3a3a679618397d6a7f79638fc09e1940d1753879b07510123aebb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. The file's structure as a link farm is designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5648

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 https://pistant.ru/uplcv?utm_term=sams+teach+yourself+sql+in+21+days+5th+edition+pdf PDF link annotation
    • http://uklearningnetwork.com/userfiles/file/36221962044.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/cb9306d27824152b80db6da3a853d256/41484117881.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399928aa10f---nuguvemamakorotep.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/54673596045.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/26124483473.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/gotutife.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/katerub.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/xuzezonewetijazikimu.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/segipu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ks85qin67e4gdo5bh9iiesh87h/10028976811.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/65553234711.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/99786232004.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140925be8dba---70982140419.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/87778059366.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/sutoxusalis.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/vutisonewexa.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/50228405828.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/wixan.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210903222450.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/20972980613.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/68688547952.pdfIn PDF document text
    • http://lex.tj/img/file/buvep.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/59415826672.pdfIn PDF document text
    • 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_off00011f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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