Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c247a67a84d86b2…

MALICIOUS

PDF

99.8 KB Created: 2021-08-21 02:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2d124f6e4f09582272d044a02295c260 SHA-1: dea16191ed5630413c97c4e3ff5d8ccd3fbc96f2 SHA-256: 1c247a67a84d86b2319296544d161700a2e2d995d260456c68808c70f908071c
156 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, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to various external websites, some of which are hosted on compromised CMS platforms. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests an effort to obscure the true malicious intent by distributing links across many disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://zafirkort.com/uploads/files/babinoxuwapixefugaxib.pdf In PDF document text
    • http://www.anclupnapoli.it/userfiles/file/81659707786.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9fdf225de7c2037f695610111866175f/67166697700.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e279288b78856f9094c1433e3bfeb8fd/67782964869.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/limoz.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a32b78e1c7---8038114840.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fda08b258d1---30628142384.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/31823447765.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/gulutenijejixuguvele.pdfIn PDF document text
    • https://preciseenergygroup.com/media/46393978889.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/gibowosikajep.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/9mv58qp256uj2mqg5s3bbviflu/35511895105.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd340a8fad7---40855652515.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/44875263326.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/43829741629.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/jazovetaran.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/97925962460.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/bigom.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/80099506512.pdfIn PDF document text
    • http://contelex.it/userfiles/files/xepasegetewibi.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3c6686f0aeca0c83d9b39e2a62ee2f6a/35533348906.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/92472656552.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jeviwuruzolanirogebibama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=raz%C3%B5es+trigonom%C3%A9tricas+exerc%C3%ADcios+resolvidos+9+anoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 22448 bytes
SHA-256: d01add6f76bedb13d8a2a27cdb6c4add957ad50645406c3dce65e071af0951cf
font_01_sfnt_off00014c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1641F 11592 bytes
SHA-256: 4e7755bfc27478043621dcb99bab4f658aa125fa10a66927da31350c6b85d20e

Open this report in the interactive analyzer, or submit your own file for analysis.