Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8facff1cfe8929…

MALICIOUS

PDF

134.6 KB Created: 2021-06-27 09:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3a9b26b7eaa362b61761cd0c3060cd9 SHA-1: 3869611db073ebd2ca23994dea6967bf9eca7088 SHA-256: 9a8facff1cfe89293121214763ea05f115aab7d0cb6e82872d1b4fd53c60aa27
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of link farms on potentially compromised CMS platforms suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6518

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://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/0a5605c0aef0f08f85ce1d5ebda2d8af/46217325980.pdf In PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744805b09fd---migezopujosalufotolol.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/rk3q864h3csuugipolajbhc4to/99701735593.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a66a4142207---61225421798.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/mifalevoseri.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/43780e2c2459350648b7ea40fb774621/91198883269.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/b5jujsc57v2oemq6hk1f5cc7ba/90829497660.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/jujuvagujod.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/038e0665812eb59822af8409261d17ec/79973531036.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/58047472121.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/laxapulexone.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/32840637250.pdfIn PDF document text
    • https://puntoagricoltura.it/file/ligaz.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/wejetitudajimomikikepeg.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87871a46f4660b2561ed7df0c22b24c8/78885493772.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b4f564fcf---41082375042.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gr1druhj44mggsa75kl111kg81/78603837930.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/zuzes.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ccb930747---53258681828.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210517103036.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/u1n94s1ftbcolnomncaeuilkie/dogaburiwobenenubiminobe.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/jedis.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/39272338487.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/ripifuzunax.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/nuboranedevelizowel.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160784066d7ea3---bapovak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+second+law+of+thermodynamics+and+entropyPDF 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_off00020221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20221 11048 bytes
SHA-256: 995b4cae218a64028181080dd368ff7f3a381c3e0fec521bfe8cf6dd6e952ad9