Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d9dea201dcfff3…

MALICIOUS

PDF

85.8 KB Created: 2021-08-19 07:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f37eb1af1692db39889364405a94a254 SHA-1: 72b238665844e228240e767d0226dc958e44c115 SHA-256: 95d9dea201dcfff345563899ea683a939deee0e4003c8d0658557fd049d8e652
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a 'download' button lure further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=bajirao+mastani+movie+download+khatrimaza PDF link annotation
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/putenedamegaxid.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/nigowafojaza.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2baa369856---54998539176.pdfIn PDF document text
    • http://ndt-ultratech.com/files/mikadozixevojokosuv.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e513fdb7859d2e92b09fed7d90bc0438/35405333690.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ad054eef70e---11513625505.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/mozoxifekemezus.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/k8ecq45s2m0d1e0gn1qa66kk5p/sazaramijexal.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcbd131fa4---48954793931.pdfIn PDF document text
    • https://inncredel.com/uploads/nigidugoxi.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/54954101364.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/62431136090.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafcfcde0f4---31412116599.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/toleluzetabisosibazune.pdfIn PDF document text
    • http://unityproductions.com/upload/files/54990079352.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/kowamerajes.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1e85d416---roditorojozolabiw.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909585e8844---46194511973.pdfIn PDF document text
    • http://exima.kr/userData/board/file/8751207826.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a061c80a5a4---turujiti.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/joxuxolofaxubusa.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/busibalemo.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/bk47e0rh6fae0mact8c7chvu7l/49578176649.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/df5539b88d9e70cec301e4886d1718b0/zekepunutum.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812f4de2d39---zudigixexilobokugilo.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_off0000e7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E7 11000 bytes
SHA-256: 9435a1a9ac441360088d04aef7b463d124a9248043a4c0e033a817e8890dc96a
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11966 17192 bytes
SHA-256: 80c465b5907b4112071c3ebb3a9bf70738f864894a1f69454c41d9f71c053034

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