Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9c0da389d46d30…

MALICIOUS

PDF

76.5 KB Created: 2021-09-07 10:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 908b3bb5e1839ab383898fda439942a4 SHA-1: 7b24ed4b8786282c69b10c04655a9f5bae26235b SHA-256: ad9c0da389d46d30c61c60c193092304462566c3cb66dbd18a48749a66f91672
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the nature of the hosting indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

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://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c2c770311---vekalepebijojag.pdf In PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/14761437101.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/44e330a9e189576d2958f3525b76c108/12121258412.pdfIn PDF document text
    • http://mploa.com/clients/2/2c/2ccb326c3583e393996f575e36ee3974/File/93775414482.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/07dc13330890119985a0ad9b1ef53e74/26743713423.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/80989607586.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/58196976829.pdfIn PDF document text
    • https://bio86.net/fichiers/37437605057.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/mufafeligewixatugus.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/710b2e0a517e3fcf47178453958e84e2/8500447275.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe59822cf7---72425878429.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/94906993345.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/08a2b3bf1f15cd16797a4b194c1bdb3c/57598266945.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0904643b88---widadigag.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/hqbfoorh2gg6nls41gt0089dl4/86999815027.pdfIn PDF document text
    • http://fedoro.ru/upload/file/76847101098.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cfd7b2bff---38088396704.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8cad320bf---tapuxejenovomotiwokon.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612574efcd503---3822337649.pdfIn PDF document text
    • http://erex.hu/upload/file/51738676208.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/71281372154.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/dowat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=neoliberalismo+e+reforma+trabalhista+no+brasil+pdfPDF 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_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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