Malicious PDF — malware analysis report

Static analysis result for SHA-256 b119ea360a91c01d…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 05:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd09e97261233a82e97b5efda45fd644 SHA-1: b17cf3148d95229f05f0893fe59ce704c6abe116 SHA-256: b119ea360a91c01d58c2f69ceb5ed157fa0a8781ca3908ee09ce1f4fede6c99d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=iluminismo+artigo+pdf PDF link annotation
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/nd540ltit3njg7cgmbk1g6mabl/21856931975.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/buxudowowumoxekarup.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ceb96f7dbd11304d55c5e1952c1aa157/39512337314.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/90301cb76e7050902b766ecf3497c559/roxelafapikowu.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/7c2da11bcd08824c81fa0fcaee3834c9/1851854774.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/gl17c3d9mogivl1ac3ibjspv5m/wabajirojuwexerimokan.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/38683616196.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f539397647---genokedogot.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bece7cac2d8---woluxegiw.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/geputetezusukofogufa.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/rewalexuxej.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/xetesa.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f2b82cdd819ff593b5c2cf09d678e89d/58170719085.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104dc986ef88---27970256061.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070729328956---85751906740.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f01a4972300---3723761185.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/linuzenawusonuxajijo.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/nusuzigutudugewezu.pdfIn PDF document text
    • http://crm333.com/documentos/file/vozexunanugolobusopeb.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/646d79gpkmi1g4uk85r8qmfn5s/rajig.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/reraluwupalateluzepi.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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 18988 bytes
SHA-256: 42be14eb86dc70e211dcd4cbd55d488f5549f18b2574094242e3936bca790e7c
font_01_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 10760 bytes
SHA-256: c5c23d8f17beca3cb66e390f63a2ce16c828394421e1a043eeb4eb5147d8674c
font_02_sfnt_off00013073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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