Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1c6c5cc969e043…

MALICIOUS

PDF

84.1 KB Created: 2021-09-04 14:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 28dc10adbdf3a5cbf84803cf9c40409c SHA-1: 34c673afb8df0f4b3cae928d8c11453d7b0bd153 SHA-256: ce1c6c5cc969e0438c6cae77b3daea31a91e1379fe1f02a1b317b37f99c2052d
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. This structure is indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/qoncvmb77vngqtmcovet11srg6/76287972122.pdf In PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/15787106643.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vkug95fnurugcja5dc16aa4v8m/kezovekerokezi.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/7860932685.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/814959247.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/20133859596.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/78681099437.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/e0691751c65f8ae897dc508719e3c926/80305105828.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/73297710053.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/331bbb8009d6c200656406121edddfd5/jadilaraw.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/r9ag4f22b8vncb7orognumva1i/lezixanuboxu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f037c320fd3---36350244000.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210726_E37B45320F2A3973.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/zivumanizezekamiturafore.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/zukegejipugipigumolaz.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160861c66eae0a---tivugut.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/fopevezumonar.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/29912583078.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f738873624---zeluwewovimatosaximegipe.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/440d2de17296609b6d032d78aeb36ae8/jarexopuzolejajiti.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/98834393253.pdfIn PDF document text
    • https://siroyensao.com/upload/files/72148807761.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/566b6f08dbc59e3afbeba208b7971a6f/muxipisavibubuje.pdfIn PDF document text
    • https://atl-50.com/files/file/28839846607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=manual+coffee+grinder+mechanismPDF 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_off0000e440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 17776 bytes
SHA-256: 2165faee5482882dff1266bf1f3f95176852d893380564c7100ecd46db5a3431
font_01_sfnt_off00011219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11219 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A30 10920 bytes
SHA-256: e3ab15f1f3bad5cab190670ac85f58352c17e94d19848e93dc0557a760428e85