Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e17d4f60fe849c…

MALICIOUS

PDF

79.5 KB Created: 2021-08-19 20:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 86d0804b2fcb7efec25d21dc27155b37 SHA-1: 8d7efb4523cf656eb3b017464fe20b3acce85f99 SHA-256: 75e17d4f60fe849c3dfc674f5bab9fc4c69d1f7d036d8905e0fa460e84957466
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://farmaciafasolis.eu/userfiles/files/tariwijufifutexesexasuraz.pdf In PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/18i785oin0qul9db3k4gslevk4/99666558210.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085048114edb---zewifipemasarum.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/revuvov.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/korolulodexaxagigomewaz.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/50b477cb4d0c75597dbdf7bf6421c09c/16826295563.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/10ub455n9dkoarvutfhjeu32t4/budebekudo.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609f06ecc5417---vovil.pdfIn PDF document text
    • https://steammining.com/userfiles/file/53300235010.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc55cbc324---55447230022.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/kilufezugerogip.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ff7c502e917aacd76ec74dbcf94c83ad/80558719078.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/584cb2e3a5fe61d8c578baacd8e34260/suselilepodivawe.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/tusabozarodej.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/konek.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7e6c27af3---61735205873.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/us0lpdsq6ns37ltqgntm2e3boe/porugebuxomimar.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/jinoxewokavuguxu.pdfIn PDF document text
    • http://alptw.com/images/files/80349787580.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/bilamewezenuxuwetarozuge.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/kizebir.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/j402ntctqtqlpj5lt25h8u4i17/xijuxaginubiwopisaf.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/9299956766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cuadernillo+de+lectoescritura+para+primer+grado+pdfPDF 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_off0000cfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 17552 bytes
SHA-256: 9af6c4f97effe1f7743c211a28cbfb42604fa4ea78822f2c4549dc693b9159e8
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 11092 bytes
SHA-256: 81f0d06e64a8ad38df8241e6e1a59d12959ac30fa2da1588b1281dc2857e9356
font_02_sfnt_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1