Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4adeb85ef01ec6…

MALICIOUS

PDF

79.5 KB Created: 2021-08-07 12:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ec3622a96f0a152942d418965d289a87 SHA-1: f80f51a67b7df3b23ac510a45c6858877f940e64 SHA-256: 9c4adeb85ef01ec6bbc18d1e3076f32ba145310cd9d33dde82ffa738848aa9a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload storage. The primary purpose appears to be directing users to potentially malicious or compromised external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/6ii3k23bndc1moltcgovnrt751/webukag.pdf In PDF document text
    • https://camping-du-lac-dijon.com/fichiers/wegot.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/87535062862.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d55d100957---70750831748.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/nodid.pdfIn PDF document text
    • https://baglab.pl/galeria/file/83264937910.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/81775209189.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3149719a4---74185831623.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3afddebec2---digin.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/8v9h32qh0j0lj8r67vmc5c6eu1/16046839875.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083a91a3bb0e---1293843365.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/bumulupunejixibolimo.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/333234104.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/jarasigixukofix.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210714_6E78FA1242B4463E.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b57b201364a---28531078670.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/23872202485.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1a2e88a05---pilagodokakutoradabu.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/92646200017.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf15ceb978c---sowatesalerokiwaxifiv.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/rozepirujumigoz.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/dupux.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/manomibowovamoluvine.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/dedova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=heartbreak+hotel+michael+jackson+official+videoPDF 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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 11160 bytes
SHA-256: 52358b1cf94c027189cfc8a476aea34e2fef342f78a07b3d028e0232eb3b8bb9
font_01_sfnt_off0000eab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 17384 bytes
SHA-256: fe1c248c6491af287bd21dc7ea86f6f49bf1f960201e6cfd7d9f000cd716cc60
font_02_sfnt_off000117fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1