Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d7f6ad9366f339…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 06:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d311665d5002249e602ac7acfaeeaf32 SHA-1: 30fa5b92c311ad1f051091347c17f950aa933b12 SHA-256: d3d7f6ad9366f3397b5af8d9f7ba2e8b3859bf71cb546133b022cfa14b28c1cf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=harry+potter+deathly+hallows+epub PDF link annotation
    • https://mollis.rs/files/darixelezasuzajaporuzik.pdfIn PDF document text
    • http://ladna.pl/user_images/file/42138955012.pdfIn PDF document text
    • https://kar360.com/resimler/files/76477362851.pdfIn PDF document text
    • http://kusistoconstruction.com/userfiles/file/nopisivagikotosigobip.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/46199740891.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/50748081064.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/10956083245.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/12365687538.pdfIn PDF document text
    • https://thehouseproduction.net/file/mojejasolemajajitobaj.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/54719605754.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/11679456156.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210919_6E80CAE8F910627D.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/40950282588.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/2831939253.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/labebat.pdfIn PDF document text
    • http://videocycling.info/files/file/41062692726.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/43781335083.pdfIn PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/gonuwifosi.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/tonukefekokifezebu.pdfIn PDF document text
    • https://negaratoto.com/contents/files/jujosukexevojulotuxa.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/95958185456.pdfIn PDF document text
    • http://agilesolutions.in/uploads/38988911376.pdfIn PDF document text
    • http://gibisch.biz/files/files/83224134624.pdfIn PDF document text
    • https://pmms-online.com/assets/file/26969247126.pdfIn PDF document text
    • http://dsagco.com/Upload/file/6880904471.pdfIn PDF document text
    • 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_off0000d7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 10724 bytes
SHA-256: 1742788b3f626e61eae7fda21ed9ca71cca7e140175576dae1534a2cf08b009d
font_02_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 17936 bytes
SHA-256: 0811e766a5abf8a9bdd5c3e4c7fb1d393e65bdcb182a0fe3c7862e81c5ad479b

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