Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcadc25a09204a5f…

MALICIOUS

PDF

95.7 KB Created: 2021-08-17 06:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 971466c4bedf1a415dcccd0cadfb8f4e SHA-1: 74149a76657a1dff3993b6028227bd5a1e2a8026 SHA-256: bcadc25a09204a5f19e9d02ff2a9b1613bbd7facb0ccbfa443732d75b736cff2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, directing users to various URLs, many of which are hosted on compromised WordPress sites, to download further content. The presence of external URIs and the link farm structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

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 https://philabc.ru/uplcv?utm_term=adobe+premiere+2014+mac+download PDF link annotation
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ffbe3c611ce144ad8873a4d747ba8de1/mutonedaxagutukek.pdfIn PDF document text
    • http://fitviewer.biz/files/file/pebujijivij.pdfIn PDF document text
    • http://dgjst.com/upfile/file/xifavodiripumezix.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f28e39e299d---vupajabebakuxasarumoriru.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/midoguviremupidaxidako.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c555d86189b---56531269815.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fcad31d6c---28636463260.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/40288805158.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/dugab.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/35a8c2c47290ad3dab7259182c68b32d/lorawezugup.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/tixevokojugekifurobos.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e058c6ce182b06298ada14c42df80985/8133893393.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/divigolume.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/lejomopazevibinuduzi.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/66937440374.pdfIn PDF document text
    • http://elskenecologie.nl/files/66110530707.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/912035ffc264787a1ddee31b1ec98958/babeni.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/xisikonizaduporubilu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa22c2524---duridawukilex.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad453e029c9---79419837570.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090c5540e43b---72451709203.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/rapoxezejepikero.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/61017beb8f19d7e9bedfe0822e6d97ef/migebulilemanozi.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/lejexuruwa.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/52657552927.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/sipafofebenoxewuf.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/fj4qvnhifr41hkijekfe775uc2/ladafobijoviwidosexawat.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16092cf20a1d21---misuzetap.pdfIn PDF document text
    • 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_off0001071a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071A 21160 bytes
SHA-256: a9b515618240b8b1d76403970abe4aebf4d0a2750d1fe20d250121adac71d81b
font_01_sfnt_off00013c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C42 10988 bytes
SHA-256: 81c301eca4dcef39e7afe2452ff4ae7cccd1ea132057f833b2d5f7d9e85daf97
font_02_sfnt_off000155a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1