Malicious PDF — malware analysis report

Static analysis result for SHA-256 c362d64da304cdc4…

MALICIOUS

PDF

76.5 KB Created: 2021-07-09 12:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fa97186b4c8c717accdc0feadea4abbb SHA-1: e15b7023d85cd165694d4e345aa84b17101c3b5b SHA-256: c362d64da304cdc468b26e2b8c7e6e55fabf292d75ebd099724d7cfa7befe624
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://studiodabo.eu/userfiles/files/3210240600.pdf In PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/45476507551.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea6d182613---vazefujekipotoxemuz.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/ketojinexudome.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/77981228286.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cb45d6d78---nunulezaxesesobujewubagun.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16093bcf34d5f4---52715536839.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/52291197460.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608853a325d89---xawezutubabi.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b29902224---fegozagozifaw.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/zotor.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/20815478583.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e70e49c142---47436151359.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/e075f1a932feb881c65ba9565430528a/62879343700.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec78c5d190f99c8bfef364d5695536e8/nelekevunebudutara.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/7512720546.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cac29d4889---77591530177.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f519e4b298---67328812366.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160caa5c0ea086---42920493153.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/cd8fe1cfc786431e75f36d17e6ba6279/17918340635.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078c99454c88---19142488826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=word+document+to+pngPDF 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_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 16216 bytes
SHA-256: f610701623b885f27b4f3f7ca67c22c52b12d38bbe7d70fc4da1a3fa18329d31
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 10484 bytes
SHA-256: 9269332a2874fabb0e9cfbc335ccb5b36524c1119f6c74395410767c0ca51512
font_02_sfnt_off00010d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.