Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2eccbb05c56a6ea…

MALICIOUS

PDF

100.6 KB Created: 2021-07-29 19:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f5ee7a84f0913dd9b85edb25d378ec8 SHA-1: 0f475861bd97c542bd61e7203bb33a15012a43a6 SHA-256: c2eccbb05c56a6eaf6f604c0877a8fd43eff40bbe0612fb796f95e02f37e3c10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://inwebjor.ru/uplcv?utm_term=el+capital+karl+marx+tomo+1+vol+2+pdf PDF link annotation
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/f66eff5abcb90b4d17cbbc0b30411206/najuji.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/44124501964.pdfIn PDF document text
    • https://mszukam.pl/dat//file/zatevufarizugimokijagidoz.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/netefewupokupefube.pdfIn PDF document text
    • https://medtek.vn/storage/file/jolodulorub.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/tifagegibavow.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/99341709907.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfc12411ba---pavuzutitefigase.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/adcf8adb0a75c790efae2ea725c73a79/xidezetuwe.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/47aae79917d271228dbbb83088b4d9a7/kulej.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba183ba6b51---62022358173.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/58e658d1ea3d6fd83e00c7e8a9a75a86/88760683479.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30c161277---48621910374.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160970e5157e43---lavufusupovumebaxudunir.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/1786393893.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/bcpseic050pdnjnhcgv2k6u0kh/daterafegodixe.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/90095788523.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/75947139636.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d31c8a2a92cf24ecd979e2d05862450a/wibemitepolidol.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160888718d0466---datopuvubarabiron.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/13b71e26a9be9604561ba4b6990c1b17/fenabanezutilixazulevofe.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/6ba5addeba106d1db301e84f20e54f67/vasefabisi.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/tabis.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/nakanaxap.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/59765288662.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_off00011f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3F 19740 bytes
SHA-256: c9e3cc864194b831201bffb928d8253e8237ee24bca165e49ea307e22d9fc359
font_01_sfnt_off00015222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15222 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A39 10792 bytes
SHA-256: a758dd30801bb04e0cde616ad624237333620be104aca8f30ea015f4dc668c97

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