Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2ab77f5339a09d…

MALICIOUS

PDF

97.1 KB Created: 2021-08-10 23:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9ffd436e571f913313d486b08a6a973e SHA-1: 67512c79c81021b8cab8b81fc51a0ec99f0a6148 SHA-256: 8b2ab77f5339a09d93f221c8d68a4861b219962451dfb9ab28aec542900e6f78
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting it's part of a phishing campaign to trick users into downloading malicious files. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were directly extracted, the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1265

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=please+find+the+attached+file+as+per+your+request+in+french PDF link annotation
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831ec3cd26d---kubodaxexutopomebarut.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b48cd5b1e07---jelinugovifekijug.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/61143747875.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/jh8s4gjd3aih1qt542oenjfbih/10896742767.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/sugibakavedorodadiwofulo.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/30681176357.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/46315478560.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/woketojoxorexesabif.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/45537633617.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856ae4da6d9---62996915303.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c8e224a09b1d6a9ad862facc6730c872/88617957684.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ga59kma5tgi7pe8m03fscmjnpj/gowepo.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/41822367192.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ce38d0461---kimudubuzim.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c9707ae1305---48546236054.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/15307033304.pdfIn PDF document text
    • http://fkhd.cz/data/img/75469832091.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/51aa27437e349239ed4dab26e735cfc3/bofatagaziriguwakudux.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609079433a962---44330205226.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/41276917626.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/36714684791.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/0hba5i3h53c6j7l5j4rm3siaja/50278598209.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/fedevonupobijadate.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/30164394498.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5bc909d6c---wejujurozadosirepalet.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f62fa6063e---sofudedibazajafiwabakaze.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/70910be41e82dbdc386938556102d453/sipaxeki.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da174d6c93---42166035221.pdfIn PDF document text
    • 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_off000151c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C1 11080 bytes
SHA-256: 8f6ebd97dc213d0e5f00df295ddcd4deb8f061af13cfe1882bc0d54e5e5e7626
font_01_sfnt_off00016b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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