Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc3e2a6de6b6204…

MALICIOUS

PDF

77.3 KB Created: 2021-07-07 13:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9edf09a07c30aab5262a6921343dc8f0 SHA-1: b32af9755a31034a03b5d13d61be2fe0e836e0e1 SHA-256: 3cc3e2a6de6b6204928baf1bb7e3eb5e3c16748237ee33a5c13d3f987830cd1a
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. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://coretry.ru/uplcv?utm_term=hotpoint+oven+317b6641p001+manual
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913cffabb72---20568226295.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/4429d8fbe82e13eabdf6320a3efc967f/widanopux.pdf
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/77655279224.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/52e7791124b8a504d2a16fa2da513560/33627555763.pdf
    • https://bushregenerators.biz/userfiles/files/mukusukiboxagebewabevido.pdf
    • http://hwayinn.com/image/files/20210626_100819.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/fe9c249487f07e1cc0a907a50ef7a092/54647135505.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082403417d78---perawidikojodov.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b356728f5---98503359799.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4e2ae1d532a65309c62a5d9cd5ca58c9/viwesavaxurotirawux.pdf
    • http://aftckwt.com/uploads/file/3727794730.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ee0e3d2d2278f79fce33932d92fe4c52/rifit.pdf
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/pogediw.pdf
    • https://secolink.sk/userfiles/file/nofavez.pdf
    • http://easternsheep.by/app/upload/file/29118963224.pdf
    • http://henri-ruch.ch/doc_pub/file/58378466259.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607894c5ab8e4---12809939902.pdf
    • http://zlato-invest.cz/upload/files/25241373996.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ae0c0519e06---8263664353.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/e2698d594ef63df015a9ba3133135ebf/kagumafita.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/jefuziwimumigidirogamow.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3c9f57eb1268a4af0cb9d98ba0c6760b/besugopejilajenorijisubu.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/5abebf8f8ebcffe4a7b12fece5a7d01d/15023383368.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3fbf9bd000e32950b820f3b87a135ff9/1738476247.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6cf.bin
54ff92a6057ee75be6ddebb1bf590c6170b5df1b27feac0723d9bef797a25286
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 17364 bytes
font_01_sfnt_off0000f477.bin
8915a9db7220901e00044c63015422891c9864db49445981677758ea39a3dd61
pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 11084 bytes
font_02_sfnt_off00010e30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 16792 bytes