Malicious PDF — malware analysis report

Static analysis result for SHA-256 95303c96f4cc20b4…

MALICIOUS

PDF

90.8 KB Created: 2021-07-30 18:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 291de58e67b452147aed851bbd52b46c SHA-1: 45eb185761bd6382c73ea8e3f3355ac94b63e511 SHA-256: 95303c96f4cc20b4bf902dd532bf851c258a829bdcb937e35127ac85a217ed76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the file being identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://moreit.ch/productinfo/file/magetasoxomosovelajer.pdf In PDF document text
    • http://okwmd.com/upload/fckeditor/file/genefixinugidotivivi.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092f35187e57---fapavepanizusaregetini.pdfIn PDF document text
    • http://ubest.ru/images/file/lewazomak.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081cb3b14022---58401693839.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/vuvizupapewafirokugoxijo.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c333fc432f5---47172853328.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/jodejexinaxuwobipewesowu.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/87312112251.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607196a26857c---jomidav.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/bovixuguputufo.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/futuvobiwe.pdfIn PDF document text
    • http://fotossc.pl/_files/file/26249932368.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/sexomevolafobinejaxo.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/j02ff3ck4neu11q1m5uokseq5p/pegojewit.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/47894178114.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/jogex.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ce676fb2f0887791525c5561012e509/fevinovipexewoxejufedavo.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f3ef88660---91549552432.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/a0d6a27961b3f418164438e0a3fcd59d/miluvota.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8fb365f44---85013283543.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c3eb8e93e---16363062550.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/buparuzomukisamagujapabu.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5f208f5ab---33570461501.pdfIn PDF document text
    • http://022-web.cn/uploadfile/file/20210725205230816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=poema+de+sor+juana+in%C3%A9s+de+la+cruz+hombres+necios+completosPDF 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_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 11364 bytes
SHA-256: 3cd6e3732954af9505c61f35192c8f262a63d67f85dc3a4a4323670ea02eed6f
font_01_sfnt_off000113b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC6 18228 bytes
SHA-256: 217f2217d31f39e1466a74ab3ae4473c65c13470650564630be7ccb9be2eb93e