Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9d7d884f09095f…

MALICIOUS

PDF

62.5 KB Created: 2021-09-02 01:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0afc5bc9e4e104ac4f24bf0d128a36a5 SHA-1: 64596365290cbf4edbf0550f8158273e5363853b SHA-256: bd9d7d884f09095f03a07e465d68a27ce3c04472e7415bf2472b3a749b3a43a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress installations, suggesting it's part of a link farm designed to redirect users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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 https://crewmak.ru/uplcv?utm_term=typo+meaning+in+english PDF link annotation
    • https://onlinendttraining.net/files/vowigaxupipupemimegukif.pdfIn PDF document text
    • http://dzbnf.com/upload/file///kezevozibimuduw.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3ccc86406---sadozajoradewip.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608063e5e54d3---kimadeporuza.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e66cb11e10---39494926364.pdfIn PDF document text
    • https://cape-electronics.com/media/file/92462642916.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c18493e9358cb38302abf97fb480288a/24911672841.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/9krrevjqn8psi4ervrsr35ji4g/96828635048.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/143259aafaafea3ea296dcb056c5530f/dojegati.pdfIn PDF document text
    • https://nistd.in/userfiles/file/17574207687.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/23263563083.pdfIn PDF document text
    • http://aawyx.com/sites/default/imageuser/file/jisobilijezokiveku.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/zubuzutezofako.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af4d4f242---voliwugadomoresos.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72502351247.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2f04e17255bd8c2fd0191847510b5197/gubonin.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-7-31/20210731175210296719.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/0c940f2ae041de13e6a69e71973566f2/tedetisudedetenijofonize.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbfcc71ea4---tosugame.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a3904a09ad4ddf241a80137d91ca9a5e/46554138499.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/vikivaxawawirefetitudita.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/18186360997.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/50274074797.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/a4a6453a4f15e6b15f8142b84142228a/30509323334.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_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 10576 bytes
SHA-256: 76fa9ece3442d17e361d2bf36eae478ff22cebe9e3f9f8640d19fba08122ee27

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