Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6c2c02cd31b8de…

MALICIOUS

PDF

88.8 KB Created: 2021-09-07 13:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1903c225ac67ee1eccba515a8ed94f9 SHA-1: dda1f828a3073540c92f45f6c9268f9ab7955a63 SHA-256: 0f6c2c02cd31b8ded733d4bce219f3d7489206337ecede903381e6e992a5d902
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, forming a link farm designed to redirect users. The presence of `utm_term` parameters suggests a phishing or SEO manipulation tactic to drive traffic to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=frasi+inglese+per+viaggiare+pdf PDF link annotation
    • http://ipllaser.in/uploads/5098185124.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/nijinitidiriveza.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/11123455508.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a91fc562c---ropuzaboza.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/63804429606.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e4c262cee---jageriweg.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/suwezewoguwolimi.pdfIn PDF document text
    • https://valdisieveshopping.it/file/jarotowi.pdfIn PDF document text
    • https://fobh.net/userfiles/files/sefexazakabadupopevevo.pdfIn PDF document text
    • http://ahchala.com/img/file/xoraki.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/nbj6blmqvgh87fhshm1n7pnsjf/peladuwugonaduf.pdfIn PDF document text
    • https://digireg.cn/upload/gekuximexegoxexumevet.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/bedekokekix.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ec82d92ec1b47a3a6fcb0e54294a5e36/nokubutasefonimojotaleniz.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/bca6bf78c6f4019f12e82f6de6800d8b/32651259517.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44b4c23f6---fogosijufonusorefulab.pdfIn PDF document text
    • http://kalikraft.com/images/file/zapovowo.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f9f921c74---35224819001.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611df6723e83b---6364448474.pdfIn PDF document text
    • http://hopsch.de/uploads/file/sidawejigixura.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/nikabadodasitalen.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840ebfdf72e---xewopudizejan.pdfIn PDF document text
    • http://ccadl.com/files/20210713100816.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160be783d6a997---85851088672.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/84401053075.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_off0000f7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF5 17652 bytes
SHA-256: adbcafb61611efaf2acc428bbf916ceb323d6181942c3b94ab2723a15aac9f63
font_02_sfnt_off00013e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E14 10496 bytes
SHA-256: 8eb84426ff25cbe99ec69b5bde812cc57a9ca0c3c2ef257f384182e7aea2efe9