Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cd96c31d3355d5…

MALICIOUS

PDF

90.0 KB Created: 2021-07-19 05:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b00e6c1b87d3709c6b74832cb66163de SHA-1: 2d0a3b4a163a4483fe7c8729cf631339dda5967f SHA-256: 47cd96c31d3355d53f25a41c259c5c269180c8b39a6cd9fc83f86e39aca4c72a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to other PDFs hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The sample's structure and URL patterns are consistent with a phishing lure that attempts to trick users into downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/daab7855f268fc8efc76af6b33ca27e8/zitoraburudilob.pdf In PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4b96de4ddca70146d7af4a52a30b44f4/2599472161.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ld46oj1al1uq41u0n4mpjaqqve/kokesopezimidoxululifudu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b69b7355b45e451f910cc9d3b84a4572/80576502780.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/rolarenanajevuvi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0db438dc0---41375421700.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609433986fa53---sorusame.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084b2f97b91a---25880422919.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210705020403.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/nubonipunifenupotugizi.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/vubewawelori.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608087e90b47e---6674636433.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/86345582410.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/40912365384.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/9n0164mcl5b6gf7s68i2gm3a10/99919824190.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/f7dc5661213f3464c6dc923f5beca4e1/vivojafinigibasozufuwur.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/titovizufifumubogomo.pdfIn PDF document text
    • http://0930actress.com/files/files/53333333721.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84437e133---rusotunipurulivipixamim.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/33949232293.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/busesovazonilazowito.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/0eb534468f6de5954b8d2eb6d8ca04d0/46519233621.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=solve+the+linear+equation+by+elimination+methodPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f9b7ded62556408e53266546345bc042/jezodenaguri.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_off0000fb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1D 17468 bytes
SHA-256: b55d32cdd004b146202d42688099908a8b4607ba6b9525af035425ce13b37e7f
font_01_sfnt_off00012900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14117 10984 bytes
SHA-256: 0f7fad1e237baf2aebcd8f79945458e842ad6a66d0506e56e026791df55b33f4

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