Malicious PDF — malware analysis report

Static analysis result for SHA-256 227136026973b4f9…

MALICIOUS

PDF

88.7 KB Created: 2021-09-07 08:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6e7fb77afc0f67065d02367a6b8c6639 SHA-1: a77128a5c8fd3e910aeb214cf80ac39ebdf76bc1 SHA-256: 227136026973b4f96c12322dd2f156b383f2480270955abaa73c41334e91f711
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF acts as a link farm, pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute further malware or conduct phishing. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6039

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://oroblupiscine.it/userfiles/files/29163107678.pdf In PDF document text
    • https://bunian-co.com/other_files/File/25200619113.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae327d18b---tijuderoja.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/baxutivikokomegope.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/ninofagovawapidow.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ef680bb48---suwumiwenomomaxibabi.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://hotararicedo.ro/files/files/tefowim.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/rogoriwujaworigu.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/14da42ad0963e1e087dc56ea6de02899/bilazemo.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/4cpi7a1d1jb122qkksiluaf2if/zelebixubosalolanowaw.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/logebelon.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/94956103656.pdfIn PDF document text
    • http://wamer.org/userfiles/file/59290226540.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1aadb58e5ce7465a9eb01a66373a8bbe/7826699103.pdfIn PDF document text
    • https://actor-conseil.com/files/file/18293749658.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ae3524a20146170ae912ae936ec3cc6f/wujuxew.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e79ca14eda---52937651670.pdfIn PDF document text
    • https://artbynela.com/uploads/file/76787383284.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f5aa5598c---jovewogudolegi.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/4be6b94d1fc62a2cbccb49b898c62fb1/puxedizigurotoserafujem.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5935254336---turip.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f1ef0d723005146ff1491ddb7c5e875e/mopulibojabej.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/zukixelokutexetiv.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16135281e0254b---bafufabusobebenite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=miele+oven+manual+h2265bPDF 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_off0001230e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1