Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcb63641bd7f14a…

MALICIOUS

PDF

78.0 KB Created: 2021-08-08 14:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fdd7df50c16820b367042a62b458ada5 SHA-1: 9fc4a0efae6b78674db600dc1c2068d5932f20e4 SHA-256: 8fcb63641bd7f14a24c31d87bf11c3f3d0a13d8e9223211318f359d3c1a14401
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The embedded URLs suggest an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8703

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://accuratesearch.com/userfiles/file/30126855142.pdf In PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/saq6oos7vqg0lkf3tqauurfgk6/kofok.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd0ea0e01f---gakadexuwezowusilufep.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5a66e872e---96378697773.pdfIn PDF document text
    • https://betibg.eu/webroot/img/files/26715639256.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/77152465938.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/gawizabu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b2866b295cb---45030855651.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8c8d9006aa7ab6394adebcae035e08c1/9878164928.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210719141152.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/razatidupavegebo.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/202161865347.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/51804512502.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/fevumero.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f38795d3171---58232675374.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9bc7c22f92b72cb8f3b31296abbb7f78/tomaber.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d4970e2c3---gopuxisepudabogaje.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d81ed109f---20541362709.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/99278981305.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/poselek.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/xipuxevememate.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/48098321536.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/pufimipafegegelurofoj.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/kipkcbb2m3u35rip44tlkgp4qg/29221416715.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e32585836e6073483e8039861d05cede/kotejotexusigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+best+app+for+free+movies+on+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 16772 bytes
SHA-256: c133744708270b9dbb99f56e2daee39dcd751884dbc4b9a57f3bc38f2ce78b70
font_01_sfnt_off0001239d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1