Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d0075240dd1afc…

MALICIOUS

PDF

67.8 KB Created: 2021-08-09 19:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de17d2b1693a8f97270f9081d9359c55 SHA-1: ac93d8a65d81aea27ae62251ea3be0693e03a459 SHA-256: c1d0075240dd1afca5ed4f629d8b43893ffc2f1b9d7bcda96f31bbd6ae42a044
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs are designed to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9405

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://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b834454fef5---temenigipuxosadarinani.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16094dd999ea8b---wulopiwuxoridoxufanalo.pdf
    • http://originalcheck.it/public/img_admin/file///3013696898.pdf
    • http://fine-cottage.ru/userfiles/files/nuletelazogige.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f60f3248c---jogorakiter.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/551246022ac6891fd84cb4f5b18fd3f9/60079578078.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcef9cd538---40493444601.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c10a8db11---winido.pdf
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/zujemajalufos.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b5dcfcc8eb80d6696e80b51f5480fdd1/zijagutilapofapisi.pdf
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/36984464384.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce22b4c1ad---tuwutesimelawit.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/00m13lttdihsb5rcil469jvt7g/nupipekesifale.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faf860b7b91---sonazikotanun.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0421d5af5---wefoteraf.pdf
    • http://nail-free.com/ckfinder/userfiles/files/65969895159.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070b261964c8---92435842842.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c92fd5bc85b---kedukatitidajesodubuniza.pdf
    • http://ahcxdq.com/uploads/file/131216586069.pdf
    • http://onboardviaggi.it/themes/userfiles//files/57602842035.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/dugufoxuvizuked.pdf
    • http://phuvuongcorp.com/luutru/files/62934469627.pdf
    • http://henca.com/files/details/file/26369297323.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pde29v8c10mdke77orqo6o7sig/fuxujisexomubik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ruta+cr%C3%ADtica+ejercicios+resueltos+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF846 16792 bytes

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